Calculating the Effective Area for Single Mode and Multimode Fibers The effective area for single mode (SM) fiber is defined by the mode field diameter (MFD), which is the cross-sectional area through which light propagates in the fiber; this area includes the fiber core and also a portion of the cladding. To achieve good efficiency when coupling into a single mode fiber, the diameter of the. Splicing Single-mode to Multimode Fiber Introduction The single-mode to multimode fusion splice is required for Fiber SenSys products that utilize an insensitive lead-in cable. This document aims to address the common questions and concerns received by Fiber Technicians as a result of the telecom industry prohibiting such a splice. Fusion Splicing Telecom applications prohibit single-mode to.
Multimode fiber permits multiple angles of light waves, called modes, to propagate through the core. multimode means the fiber can propagate multiple modes. A larger core means multiple modes or multiple rays of light can travel down the core simultaneously. The core is also surrounded by a cladding just like the single mode and that brings the overall diameter of the optical fiber to 125 µm. Our switches have SFP-LH-SM (LC connector- SINGLE MODE FIBER) on them for which we have L C-SC Mode Conditioning patch cords(CAB-MCP-LC) to connect to my MMF cable plant. But the fibre patch panels are old ones and have ST connectors on them. I don't have budget to buy more MCPCs with LC-ST type connectors. So I researched and found that there is some sought of connector/converter/plug which. . When we connect multimode SFP with Single mode fiber only fraction of low-intensity LED emitted optical signal will get in much narrower fiber core, but sure - some part, what will escape intense attenuation of reflected signal, definitely will get there, but will fade after meter or less  Single-mode fibers are therefore better at retaining the fidelity of each light pulse over longer distances than multi-mode fibers. For these reasons, single-mode fibers can have a higher bandwidth than multi-mode fibers. Equipment for single-mode fiber is more expensive than equipment for multi-mode optical fiber, but the single-mode fiber itself is usually cheaper in bulk
Multimode fiber has two types of light propagation—step index and graded index, while single mode fiber has only one step index. And the light propagation reduces less in the single mode fibers transmission than that of multimode fibers. Optics Difference Viele übersetzte Beispielsätze mit single-mode and multimode fiber - Deutsch-Englisch Wörterbuch und Suchmaschine für Millionen von Deutsch-Übersetzungen Left: Single Mode fiber is usually 9/125 in construction. This means that the core to cladding diameter ratio is 9 microns to 125 microns. Multimode Fiber Optic Cable. Multimode fiber optic cable has a large diametral core that allows multiple modes of light to propagate. Because of this, the number of light reflections created as the light passes through the core increases, creating the ability for more data to pass through at a given time. Because of the high dispersion and attenuation. Single mode and multimode fibers are physically different. The single mode has a smaller core size, with a typical diameter of around 10µm. A multimode fiber core is either 62.5µm or 50µm, a difference that is impossible to see with the naked eye. With protective cladding, both single and multimode fibers have a diameter of 125µm. Functionalit . Multimode fiber is available in two sizes, 62.5 or 50 microns, and four classifications: OM1 (62.5/125 µm), OM2, OM3, OM4 (50/125 µm). The diameter of a single mode core is 9µm. Both fiber types have a cladding diameter of 125 µm or microns
Single Mode Fiber. Multimode Fibers - OM1, OM2, OM3, OM4 and OM5. Multimode fibers are identified by the OM (optical mode) designation and their specifications are outlined by the ISO/IEC 11801 standard. Multimode cable disperses the light into multiple paths as it travels down . the core. This allows for higher bandwidth over short to medium distances. However, on longer cable runs. Fiber optic transceivers are an integral part of optical networks. Transceivers can be classified in terms of data rate, form factor, modulation type, distance etc. Read this article on How To Choose the Right Transceiver to learn more about various classifications and what parameters to pay attention to. Single Mode Vs Multi mode transceive Single-mode fiber confines the transmitted power to a single-optical mode, which propagates down the center axis of the fiber. This results in an elimination of power loss through leakage out of the fiber walls. The Model 279 regenerates signal strength and is mainly used to exceed the distance specification for multi-mode fiber. It can also be used when the optical fiber type specified by a.
Single-mode fiber can transmit data over much longer distances than is possible with multi-mode fiber. It accomplishes this by limiting the amount of power lost through leakage in the walls of the fiber and using 1300 nm wavelength emission which has less attenuation than 850 nm. Thus, this converter regenerates signal strength and is used to extend the distance far beyond the specification. The inner side of the single-mode TX and RX interfaces is coated with white ceramic. The multi-mode interface is brown. 2.Differentiate from the model: Generally, whether there are S and M in the model, S means single mode, M means multimode. 3.If it is already installed, you can see the color of the fiber jumper . Various types of optical modulators such as electroabsorption modulators and electro-optic modulators are usually based on other types of waveguides which can be coupled to fibers. Faraday isolators, Faraday mirrors and circulators contain bulk-optical rotator elements and collimation optics. Fiber-optic switches as.
When we consider the equipment SFP price differences between Multimode and Single mode, remember $2 difference for 1 Gig and $5.00 difference for 10 Gig the Single mode wins every time. When considering 40 and 100 Gig applications OM3 and OM4 require 8 and 20 fiber minimums for multi lane transmission - the optical fiber price savings compared to Single mode is staggering. One of the more. Transparently convert Single Mode to Multimode, or extend the distance of a Multimode network.These Fiber Mode Converters have Fast Ethernet (100Mbps) transceivers that regenerate the signal before passing it along to protect data transmission integrity with a strong signal across each fiber link. Perle Fast Ethernet Fiber to Fiber Converters provide an economical path to extend the distance. Single mode means the fiber enables one type of light mode to be propagated at a time. While multimode means the fiber can propagate multiple modes. The differences between single mode and multimode fiber mainly lies in fiber core diameter, wavelength & light source, bandwidth, color sheath, distance and cost Single-mode optical fiber costs less than multimode fiber. When building a 1G fiber optic network that has to go 10G or faster, the savings on the cost of fiber for single-mode saves about half-price. Though single-mode optics are more expensive, the labor costs of replacing the multimode are significantly higher in OM1-OM2-OM3-OM4
Single mode fiber and multimode fiber are capable of achieving the same speed from 1Gbps to 100Gbps. Since the transmission radius of single mode fiber is smaller than that of multimode fiber, a single mode fiber can only be propagated by one beam during signal transmission. So that the scattering phenomenon will not be caused, and a long distance can be transmitted without deformation. Yes, this absolutely is a problem. Don't ever mix different types of cabling. Multimode has a 50 or 62.5 micron core diameter, while single mode fiber typically has a 9 micron core. If you connect two fibers with different core diameters, you'll lose a lot of the light going through the connector, resulting in a link flapping or being down. Share I have done MANY fiber installs. NO it will not work. I would return the one or the other for a refund/exchange for what you need, personally I would go multi-mode fiber with multi-mode transceivers or vice versa single mode fiber and single mode transceivers. To be honest go multimode either way it is mostly directional for most fiber.
Common connector types are named FC, SC and LC for single-mode applications and ST for multimode, but there are also dozens of other types, with special qualities such as duplex connections, particularly small size, built-in shutter for improved laser safety, etc. In most cases, the fiber is glued into the connector with some epoxy, and then the fiber end is polished. The transition losses of. The principle of optical fiber moduleThe optical fiber module is composed of optoelectronic device, function circuit and optical interface. The optoelectronic device includes transmitting and rece... Products. FTTH. Datacom/Telecom Network. Wireless Interconnect. AOC/DAC. New Released. GPON 10G ASYMMETRIC EPON GEPON 10G SYMMETRIC EPON XGSPON & GPON COMBO. 1.25G SFP 10G SFP+ 10G XFP 40G QSFP+. Multimode to Single Mode or Multimode to Multimode Transparently convert Single Mode to Multimode , or extend the distance of a Multimode network . These Fiber Converters have Gigabit Ethernet transceivers that regenerate the signal before passing it along to protect data transmission integrity with a strong signal across each fiber link
Single-mode fiber optic cables are faster than multimode cables over long distances. This is because single-mode cables have fewer switches and routers are needed. Single-mode fibers essentially have unlimited bandwidth capacity. It can also transmit data up to 40Gb over hundreds of kilometers without limited integrity loss. Single-mode fiber optic cables can also send data at speeds of 10Gb. The single mode SFP or multimode SFP means the SFP transceivers which work at different types of optical fibers, ie single mode SFP will work with single mode fiber, while multimode SFP will work with multimode fiber. So, what's the different between them? And what should we notice when using them. Today, we are going to have a discussion about this topic. If you want to know more about SFP. Camplex Fiber Adapter Kits Single mode and multimode fiber optic cable adapter kits include a variety of fiber optic adapters and dust caps in a sturdy plastic storage box for convenient studio and field replacements.. Multimode: (3) FOA-10G-LC-LC-DM 10-Gig LC to LC Duplex Multimode Fiber Optic Coupler with Flange (3) FOA-LC-LC-DM LC to LC Multimode Duplex Fiber Optic Coupler Adapter Bronze.
Multimode fiber Graded-index multimode fiber Single-mode fiber Core Core When light is confined by coatings rather than by TIR, it may be referred to as a light pipe rather than a waveguide. Optical planar waveguides come in various types, including buried channel guide (graded index), ridge or strip-loaded channel guide (step index), or even photonic crystal (PC) waveguide (holey fiber. Single Mode vs. Multimode Fiber: The Core of the Matter. First and foremost, the core of all fiber cables carries light to transmit data. The main difference between singlemode and multimode fiber patch cables is the size of their respective cores. Singlemode cables have a core of 8 to 10 microns. In single mode cables, light travels toward the center of the core in a single wavelength. This. This page on single mode vs multimode fiber describes difference between single mode and multi mode fiber systems.The other difference between terms are also provided. We will see the differences taking into consideration various comparison factors of transmission system such as data rate, distance, attenuation, time to travel and so on. The page also compares single mode and multimode fiber. Both the Multimode fiber and single-mode fiber cables are used widely however you need to make sure that you know what the difference between them is. There is a basic difference in the color type of fiber, fiber distance as well as the cost of the fiber in multimode cable and single-mode cables. The single-mode cable is one that will allow only one sort of light mode to be propagated at once. can we mix multimode and single mode fiber. by louiearbs. on Oct 8, 2015 at 20:23 UTC. Solved General Join Now. we are connecting 2 buildings with single mode fiber terminated at a corning LANscape panel. can we use multimode fiber to go from the panel to the switches? Best Answer. Mace. OP. Carl Holzhauer . This person is a verified professional. Verify your account to enable IT peers to.
Can I use single mode equipment over multimode cable and vice versa? This is a question we get many times from our customers. Especially common is a situation, in older installations, back to the times when multimode cable was cheaper than single mode, and inside buildings, and some last mile installations were planned so, that multimode cables were laid Multimode and single-mode fiber optic cables differ greatly in their design and purpose. While both cables use the same basic principles, each has its own advantages Fiber Optic Tutorial: Single Mode, Multimode Fiber Optic Tutorial . What are Fiber Optic Cables? Fiber optic cables consist of a glass core and cladding, buffer coating, Kevlar strength members and a protective. Hi, It was mentioned that GLC-LH-SMD support both Single Mode and MultiMode fiber. I think it should be quite sure that it can support Single Mode since this is the only transceivers module that support Single Mode. Does anybody have experienc Versitron offer multimode to single-mode fiber media converter that convert 100 Base and 1000 Base multimode networks to single-mode networks. SFP flexibility, Full wire speed performance. Buy Versitron multimode converter with free shippin 12 Fibers, Female to Male, Single Mode & Multimode, MPO / MTP Fiber Optic Patch Cable, Find Details about Fiber Optic Cable, Fiber Cable from 12 Fibers, Female to Male, Single Mode & Multimode, MPO / MTP Fiber Optic Patch Cable - Wuhan Seifree Technology Co., Ltd
MMF = multimode fiber; SMF = single-mode fiber. The researchers fabricated their laser by splicing a precise length — 10.236 cm — of Er-Yb-doped multimode fiber to a single-mode fiber (Figure 2). They chose the multimode fiber length so that input light at the peak erbium gain wavelength was reimaged at the splice after reflecting off the dichroic mirror at the other end of the fiber. The. . This effect can confuse the receiver and produce errors. Mode conditioning cables utilize an offset between the single-mode fiber and multimode fiber to eliminate DMD and the resulting multiple signals allowing use of. Bulkbuy Indoor FTTH Drop Cable 1 2 Core Single Mode Multimode Fiber Optic Cable Core Optical Fiber Cable Price List Per Meter price comparison, get China Indoor FTTH Drop Cable 1 2 Core Single Mode Multimode Fiber Optic Cable Core Optical Fiber Cable Price List Per Meter price comparison from Indoor Fiber Optic Cable, FTTH Drop Cable manufacturers & suppliers on Video Channel of Made-in-China.com MULTIMODE TO SINGLE Mode Fiber Converter - EUR 198,79. ZU VERKAUFEN! The non-managed fiber media converter is designed with a switch controller and 16283719681
Fiber Repeaters are used to extend and repeat Ethernet data signals over multimode or single mode fiber up to 160km [100 miles]. If you need to convert Single Mode to Multimode, or extend a Multimode network, Fiber Optic Repeaters are the devices to use.They are the ideal solution to connect different fiber types, distances and wavelengths (WDM, CWDM & DWDM) across a variety of topologies and. Single-mode optical fiber often costs less than multimode fiber. When building a 1G fiber optic network that you want to be able to go to 10G or faster on eventually, the savings on cost of fiber for single-mode saves about half-price. While the multimode OM3 or OM4 fiber increase 35% in cost for SFP modules. The single-mode optics are more expensive, but the labor costs of replacing the. Optical fibers can be classified into single mode fibers and multimode fibers depending on the modulus of the transmission point. By mode meanS a beam of light entering the fiber at a certain angular velocity. A single-mode fiber uses a solid-state laser as a light source, and a multi-mode fiber uses a light-emitting diode as a light source. The difference between multimode and single. Single mode fiber provides users with a greater transmission rate in addition to nearly 50 times longer distance as opposed to multimode fiber. In this regard, single mode fibers will require single mode transmitters which use solid-state laser diodes. The cost of this transmitter equipment may be 5 or 6 times more than that of multimode equipment . Just as in the multimode fibers, different wavelengths of light travel at different speeds causing short pulses of light injected into the fiber to spread as they travel. This phenomenon is called chromatic dispersion. The amount of pulse spreading depends on the.
Multimode Fiber. Multimode fiber has a larger core size that is 62.5 µm (62 micro-inches) or 50 µm (50 micro-inches). It directs many modes at the same time, allowing additional data to pass through the multimode fiber core. The following parameters will generate more light reflections, disperse light more, and increase the attenuation. As a. The differences between single mode and multimode fiber mainly lies in fiber core diameter, wavelength & light source, bandwidth, color sheath, distance and cost. Core Diameter. The most common type of single mode fiber has a core diameter of 8 to 10 μm and is designed for use in the near infrared (the most common are 1310nm and 1550nm). Please note that the mode structure depends on the.
Multimode Fiber SFP Over Single-mode Fiber - You Can If You Are Lucky. This is the question that has been asked so many times, but no one can give the exact answer—yes or no. Hence, let's explain it in details. Most people think single-mode and multimode fiber are not interchangeable. Because the wavelength of the laser and core size of. Differences in Distance. Fiber transmission distance is largely dependent on the electronics and their light output, but in practice we find single mode also outperforms multimode.Single mode fiber supports short distance transmission and long distance transmission regardless of signal bandwidth and/or resolution (such as 1080p, 4K and 8K video) Answer: Original question: What happens when you connect a single mode fiber to a multimode fiber? Generally, without a converter between the two fibers will not transmit data through the connection. The light sources used for a single mode fiber use a different wavelength than the light sources..
Answer (1 of 2): Thanks for Request, I didnt use this kind of configurations but I used the reverse. I used single mode fiber with multimode sfp and it wotks but it has to be same sfp for both sides. For your question, it shouldn't be, lets see how, the SFP is capable of sending the bits in the. Single mode has much smaller core and is design to carry 1 ray of light (mode) in as straight a line as possible. Multimode has a , comparatively, larger core than SMF and the rays bounce from outside edge to outside edge of the fiber while in transit. Single mode is generally used where longer than campus distances are required There are also two categories of optical fibers: single-mode optical fibers and multimode optical fibers. Single-mode optical fibers consist of a core placed at the center, through which electromagnetic signals are guided down to a target location. The core is enclosed inside cladding. Cladding utilizes total internal reflection to prevent signal loss or spreading from the core. In.
3.1 Single-mode fiber, multimode fiber,copper. Cabling and Infrastructure: Media is the actual physical environment through which data travels as it moves from one component to another, and it connects network devices. The most common types of net-work media are twisted-pair cable, coaxial cable, fiber-optic cable, and wireless. Each media type has specific capabilities and serves specific. Single Mode Fiber hat ein größeres Abstandspotential und kann Strecken zwischen 2 Metern und 10.000 Metern unterstützen. Die Optik ist jedoch doppelt so teuer wie die MMF-Optik. Eine Sache, die bei Multimode-Fasern zu beachten ist, ist die Qualität der vorhandenen Fasern. Ich habe mit vielen Kunden gesprochen, die Mitte der 90er Jahre OM1-Glasfaser verlegt haben und nun wollen, dass 10-GbE. Although more cost-effective than Singlemode, Multi-mode cabling does not maintain signal quality over long distances. Multimode cables are generally color-coded orange or aqua; the Aqua Fiber Patch Cables are for higher performance 10Gbps, 40Gbps, and 100Gbps Ethernet and fiber channel applications. See all of the Multicom Singlemode and Multi. Ethernet Fiber-Fiber Converters enable the extension of multimode to single mode fiber connections to distances up to 20 km
Multimode and single-mode fiber optic cables differ greatly in their design and purpose. While both cables use the same basic principles, each has its own advantages Fiber Optic Tutorial: Single Mode, Multimode Fiber Optic Tutorial . What are Fiber Optic Cables? Fiber optic cables consist of a glass core and cladding, buffer coating, Kevlar strength members and a protective. Single Mode vs. Multimode Connectors - There's a Big Difference The fiber optic cable, sometimes referred to as the optical fiber cable or optical fibers, is a mainstay of communications. Bulk single-mode fiber optic cable holds several advantages over multimode cable, mainly in terms of bandwidth and distance. In general, bulk single-mode fiber optic cables have a smaller size core that only allows for one ray of light (one mode) to be transmitted at a time. A smaller core lowers attenuation and enables the signal to travel over longer distances - making bulk single-mode.
Multi-mode optical fiber is a type of optical fiber mostly used for communication over short distances, such as within a building or on a campus. Multi-mode links can be used for data rates up to 100 Gbit/s. Multi-mode fiber has a fairly large core diameter that enables multiple light modes to be propagated and limits the maximum length of a transmission link because of modal dispersion Single-mode VS Multimode Fiber Optics. Put simply, the main difference between SM and MM fiber optic cables is the size of the core. Multimode fiber is thicker and measures in the 50 to 100-micron range. The thinner single mode fiber core has a diameter of only about 8.3 to 10 microns Single-mode cable (OS2) has a small (8-10-micron) glass core that is much smaller than multimode and only one pathway of light or mode of propagation. (OS stands for optical single-mode.) With only a single wavelength of light passing through its core, single-mode fibre realigns the light toward the core center instead of simply bouncing it off the edge of the core as multimode does. OS1 is. Multimode to single-mode converters provide efficient solutions for interconnecting multimode fiber LANs over longer distances by integrating single-mode fiber optic cable into the LAN. The converter also enables Ethernet LAN and WAN connectivity by providing a multimode interface to single-mode fiber carrier demarcation points. Models are available for single-mode to multimode conversion.
Depending upon number of modes propagated by the fiber we have single mode and multimode step index fibers. I. Single mode step index fiber. A single mode or monomode step index fiber allows the propagation of only one traverse electromagnetic mode and hence the core diameter must be of the order of 2 µm to 10µm. It has high information carrying capacity. The single mode step index fiber has. Since multimode fiber has a larger core-size than single mode fiber, it supports more than one propagation mode. Besides, like multimode fibers, single-mode fibers do exhibit modal dispersion resulting from multiple spatial modes, but the modal dispersion of single mode fiber is less than multi-mode fiber. For these reasons, single mode fibers.
Fiber Optic cabling comes in two basic modes, Single-Mode and Multi-mode. While both modes have different characteristics and serve different purposes, their structural makeup is still the same; an inner core made of purified silica glass, an outer glass known as cladding, and protection by buffer or jacket. In extreme environmental conditions, specialized types of reinforced fiber optic. Schäfter+Kirchhoff offers single-mode, polarization-maintaining and multi-mode fibers / fiber cables /fiber patch cables altogether covering the UV to the IR. Fiber cables are available with FC connectors FC PC, FC APC or DIN or AVIO, E2000, ST (only 0°-polish), or F-SMA (only 0°-polish) with 0°-polish or 8°-polish. The range of special fiber features includes pure Silica fibers, fibers. The coupling efficiency of light from a multimode source into a fiber's core can be improved if a multimode fiber is used instead of a single mode fiber. References  Andrew M. Kowalevicz Jr. and Frank Bucholtz, Beam Divergence from an SMF-28 Optical Fiber (NRL/MR/5650--06-8996) (Naval Research Laboratory, Washington, DC, 2006) Extend multimode fiber to 160km ( or more through chaining ) Multimode to multimode or multimode to single mode. SC, LC and ST fiber connectors. Advanced Features: Link Pass-Through, Far-End Fault, loopback for each fiber connection. To choose the best Perle Fiber Media Converter for your project, select the network topology you require When selecting single mode fiber or multimode fiber, the most important thing to consider is the distance requirement. Within a data center, it's typical to use multimode fibers which can get you 300-400 meters. If you have very long runs or are connecting over a longer distance, single mode fiber can get you 10km, 40km, 80km, and even farther. You just need to use the appropriate optics for.
Lichtwellenleiter (LWL), oder Lichtleitkabel (LLK) sind aus Lichtleitern bestehende und teilweise mit Steckverbindern konfektionierte Kabel und Leitungen zur Übertragung von Licht.Das Licht wird dabei in Fasern aus Quarzglas oder Kunststoff (polymere optische Faser) geführt.Sie werden häufig auch als Glasfaserkabel bezeichnet, wobei in diesen typischerweise mehrere Lichtwellenleiter. High quality OEM ZrO2 Fc Fiber Connector Network Cablinge Use Singlemode Multimode from China, China's leading OEM fc fiber connector product, with strict quality control ZrO2 fc fiber connector factories, producing high quality ZrO2 fc fiber connector products Single-mode fiber patch cable, which is generally yellow, is composed of a fiber optic cable terminated with single mode fiber optic connectors at both ends. It is usually used for connections over large areas, such as college campuses and cable television networks. Compared with multimode fiber patch cable, single-mode fiber patch cable have a higher bandwidth. The following figure shows the. 100Base Multimode to Single Mode Fiber Optic Converters Specification Standards: IEEE 802.3u 100Base-FX, IEEE 802.3z 1000Base-SX/LX Interface: 1 X SC multi mode, 1 X SC single mode LED indicator: Power, MM-Fiber Link, SM-Fiber Link Dimensions: 156 x128x 32mm (WxDxH) Weight: 1kg Power: AC 90 ~ 240V; DC 5V.1A Temperature: Operating at 0 to +50, Storage : -20 to +60 Humidity: 5%-90% non.
Single-mode kabel (OS2) heeft een kleine (8-10-micron) glazen kern die veel kleiner is dan bij multimode kabel en slechts één lichtbaan of propagatiemodus (OS staat voor Optical Single-mode). Met slechts één enkele lichtgolflengte die door de kern loopt, lijnt single-mode glasvezel het licht uit naar het centrum van de kern in plaats van het simpelweg tegen de rand van de kern te. Single-Mode is a type of fiber-optic cabling that can carry only one signal at a time. Single-mode fiber-optic cabling uses light generated by a laser-emitting diode to carry signals. Single-Mode vs Multimode. Laser light is extremely stable and uniform and can be accurately focused, making it perfect for long-distance transmission
When transmissions over long distances is desired, single mode fiber is commonly employed. Although constructed with a smaller core, the single mode fiber is able to maintain the integrity of the transmissions with an efficiency that is not available with multimode fiber. Thus, it is common for multimode fiber to be used in situations that are relatively contained, such as on a university. Single mode cable requires single mode transceivers, and those tend to be far more expensive than multimode equivalents. The difference in electronics can bring single mode system costs far above those of multimode, even if the per foot cost of single mode cable is low. This is one of the primary reasons we'll generally recommend multimode before single mode fiber in lower-distance applications 1. Introduction. Fiber laser dynamics have been studied extensively in the past decades to generate femtosecond pulses with high energies and peak powers. 1 Numerous laser designs are developed to understand nonlinear wave propagation under partial feedback conditions. By tuning complex cavity dynamics in single-mode fiber cavities, self-organization of longitudinal cavity modes with various.