Single Mode Optical Fiber

Why Choose Us

Industry Leadership
Fortis Group plc is likely to be a leader in its industry, with a strong brand presence, market share and technological prowess. This leading position means that the company is able to consistently provide high quality products and services to meet the diverse needs of its customers.

Innovative R&D capabilities
In a fast-changing market environment, the ability to innovate is the key to a company's sustainable development. Fortis Group may focus on R&D investment, with a professional R&D team and advanced R&D facilities, and is able to continuously introduce new products and technical solutions that meet market demands.

Reliable Product Quality
As a responsible enterprise, Futong Group may establish a strict quality control system to ensure that every step from raw material procurement to product production meets high standards. This strict quality control makes Futong's products enjoy a good reputation in the market.

Perfect customer service
Excellent customer service is the key for a company to win customers' trust and loyalty. Futong Group may have a professional customer service team, which can provide timely and professional pre-sale consultation, in-sale support and after-sale service to ensure that customers have no worries in the process of using.

What is Single Mode Optical Fiber

Single mode optical fiber is a type of fiber optic cable that only allows one light mode to transmit at a time. Generally, single mode cable has a narrow core diameter of 8 to 10µm (micrometers), which can propagate at the wavelength of 1310nm and 1550nm.

Modes of light can only propagate through single mode fiber optic cables due to their small core diameters. As a result, the amount of light reflection that occurs as light passes through the core is reduced, reducing attenuation and allowing the signal to propagate further.

Signals such as Cable TV, Internet, and telephone are generally carried by single mode fibers, which are wrapped together into a huge bundle. Single mode fiber is used over long distances, however, at high transmission speeds, the cable and equipment used for single mode fiber are more expensive compared to multimode fiber (MMF).

Add to Inquiry

G.652D

FUTONG G.652D single-mode fiber fits the operation over the full optical spectrum from 1280nm to

Add to Inquiry

G.657A1

Futong's bending loss insensitive single mode fiber (G.657 A1 fiber) is made by the advanced

Add to Inquiry

G.657A2

Futong's bending loss insensitive single mode fiber (G.657 A2 fiber) is made by the advanced

Add to Inquiry

G.657A1 Compatible G.652D

Fiber type：G.657A1 (Compatible G.652D)B1.3/B6a1 standard recommended by IEC. Low attenuation and

Add to Inquiry

G.657A2-200um

FUTONG bending insensitive G.657.A2-200um single-mode fiber comply with G.657.a2 standard

Add to Inquiry

G.654E

Futong's G.654E single mode optical fiber enables customers to construct high performance optical

Advantages of Single Mode Optical Fiber

Transmission distance

Single mode fiber supports a greater distance than multimode fiber because of its lower attenuation. For example, multimode fiber generally has a reach of several hundred meters, whereas single mode fiber has the potential to reach 200 km.

Bandwidth capacity

Single mode fiber supports high bandwidths and high speeds up to 10Gbps for about 10Km, compared to a multimode fiber optic cable.

Data dispersion

Single mode fiber only transmits light of one mode, causing no modal dispersion.

Attenuation

The fiber core in the single-mode fiber optic cable is relatively small, so very little light is reflected as it passes through, minimizing attenuation.

Applications of Single Mode Fiber Optic Cables

Single mode cable is mostly used in several applications where to need only one cable for sending at the multi-frequency (WDM Wave-Division-Multiplexing); such as –

Local area network as well as point to point links in many cities

One and multiple buildings

Small and medium scale companies

College campuses

Characteristics of Single Mode Optical Fiber

The following characteristics of single mode optical fiber (SMF) make them unique.

01/

SMF features a micro core diameter of sizes ranging between 8 to 10.5µm. The cladding diameter of SMF is 125µm.

02/

Laser rays being the source of optical signals in SMF, the characterized optical wavelengths for SMF is 1310 nm and 1550 nm.

03/

Theoretically, SMF offers unlimited bandwidth, as it offers a single light transmission mode at a time.

04/

According to TIA-598C, the industrial color-coding or sheath color for an SMF is yellow for non-military applications.

05/

Due to higher fidelity for each pulse of lightwave coupled with smaller diameters, these SMFs are suitable for long-distance transmission without excessive signal/data loss.

06/

The SMFs can transmit the optical signal over hundreds of kilometers at a transmission speed of 40Gbps and over thousands of kilometers at the transmission speed of 10Gbps by using dispersion-compensation devices.

Single Mode Fiber Types

OS1 vs OS2
As we all know, multimode fiber is usually divided into OM1, OM2, OM3, OM4 and OM5 fiber types. When it comes to single mode fiber types, it can be categorized into OS1 and OS2 fiber, which are SMF fiber specifications.
OS1 fiber is mainly used in the construction of indoor applications, such as campus networks and building networks, where the maximum distance is 10 km. OS2 fiber is more suitable for outdoor applications including backhaul networks, external plants, FTTH, WDM/DWDM network, etc., where the maximum distance is up to 200 km.

OS1 vs OS2: What are Their Differences?

It’s of great significance to figure out the difference between OS1 and OS2 when conducting deployments. The specification table below will present the differences between them clearly.

OS1	OS2
Standards	ITU-T G.652A/B/C/D	ITU-T G.652C/G.657.A1 (part)
Cable Construction	Tight Buffer	Loose Tube
Application	Indoor	Outdoor
Attenuation	1.0db/km	0.4db/km
Max. Distance	10 km	200 km
Price	Low	High

Features of Single Mode Optical Fiber

Factor	Description
Bandwidth	Both forms of optical fiber behave differently in terms of bandwidth. Single-mode fiber optic cables use a stronger, brighter light source with less attenuation. Its ability to provide unlimited bandwidth simultaneously makes it a popular option in this fast-paced society.
Distance	The distance of fiber optic cable refers to the transmission distance, which is determined by the light-generating ability of the electronic equipment. Again, single-mode optical fiber has emerged as a pioneer. It has the function of both short-distance transmission and long-distance transmission. Furthermore, neither the signal bandwidth nor the resolution quality affects transmission. Most of them have a single-mode fiber optic cable relay range of up to 10 kilometers.
Cost	Today, price is one of the most important decision-making factors in any buying or leasing decision. Businesses should always choose alternatives that offer the best results at the best price in a cost-conscious environment. To date, single-mode fiber optic links have significantly outperformed comparable multimode links. More powerful light sources and complex optical processors are expected to increase costs. However, it would be a mistake to conclude that they are more expensive than multimode fiber links. Singlemode fiber optic cables are cheaper than multimode cables due to their higher production efficiency. The numbers show that customers can save 30% compared to multimode fiber.
Attenuation	The fiber core in the single-mode fiber optic cable is relatively small, so very little light is reflected as it passes through, minimizing attenuation.
Wavelength and light sources	Single-mode fibers often use lasers or laser diodes to produce light that is injected into the cable. In addition, single-mode fibers with wavelengths of 1310 nm and 1550 nm are typically used.
Color coat	TIA-598C defines singlemode cable for non-military applications with a yellow outer jacket and multimode fiber with an orange or turquoise outer jacket.

ITU Standards for Single Mode Fibers

To facilitate fiber optic communications, the International Telecommunications Union (ITU) has created a series of standards for different types of optical fiber. This table is a partial list of the major single-mode fiber standards.

Name	Title
G.650.1 (06/04)	Linear and deterministic single-mode fiber and cable properties are defined along with test methods.
G.652 (06/05)	Characteristics of single-mode fiber and cable.
G.653 (12/06)	Characterization of single-mode fibers and cables with dispersion shift.
G.654 (12/06)	Characteristics of cutting single-mode fiber optic cables and fibers.
G.655 (03/06)	Nonzero Dispersion Shift Characteristics of single-mode fibers and cables.
G.656 (12/06)	Properties of nonzero dispersion fibers and cables for broadband optical transmission.
G.657 (12/06)	Properties of single-mode optical cables and fibers for bend-loss robust access networks.

Difference Between Single Mode and Multimode Optical Fiber

Besides the characteristics, the differences between the single mode and multimode optical fiber can be stated in a few different ways. The following are the highlighted differences between single mode and multimode optical fibers.

Impact of optic wave propagation

As discussed in earlier sections, it is understood that the manner of optical wave propagation differs according to the modal dispersion and refractive index of the core glass material. This difference in the path of propagation impacts on input and output signal via fiber optic. Let us discuss the impact of both single mode and multimode optical fiber cable.

Single mode optical fiber

In the single mode optical fiber, modal and light dispersion is negligible, therefore the light wave transmits in a linear manner. Due to the same, the attenuation is reduced and signal strength remains consistent. Therefore, in SMF, the input signal and output signal are of the same strength over a long distance of transmission.
Also, as multiple optical waves of varying frequencies may transmit via SMF but they all follow the same path, therefore all the data packets reach the output end of the optical fiber. Therefore, the reliability of data transmission from transmitting source device to the receiving device remains assured.

Multimode optical fiber

In multimode optical fiber cable, the transmission occurs in two ways, let us discuss the effect of both on the input and output signals.
Zigzag Light Propagation: In the zigzag type of light propagation in the MMF, owing to higher refraction, light dispersion and attenuation is higher. Therefore, signal loss takes place in this type of MMF light propagation. Also, optic waves of varying frequencies refract at different angles causing zigzag manner of transmission, therefore, the different transmission path is taken by each optic wave. This results in the transmission speed variation of light signals via MMF. Therefore, there is a possibility of delay in the delivery of some optic data packets at the receiver. This causes data loss.

Semi-elliptical Light Propagation: In a semi-elliptical type of propagation, the light beam does not strike in the core wall, therefore there is minimal refraction and optical dispersion. Due to the same, there is minimal attenuation. Also, in this type of propagation, all the light waves follow a point-to-point semielliptical pattern. Therefore, all waves reach the same point and then are collectively sent to the receiving device. That is why there is a negligible loss of data packets here.

Optical resource requirement

Both SMF and MMF installation require specific resources like light sources, connectors, etc.
Single Mode Optical Fiber: The SMF requires laser diode as a light source, and optical amplifiers to reduce dispersion if installed for long-distance. These devices demand precise calibration to inject the laser beam into the optical fiber.

Multimode Optical Fiber: The MMF requires LED diodes or VCSELs as a source of light. Along with the same, if the MMF is installed for longer distance transmission, then the signal amplifiers, connectors, and rectifiers may be required in the integrated circuit.

Cost deployment

Although the single mode optic fiber cable is less than multimode, the entire installed system of SMF is more expensive than the MMF installed system. This because the capital investment of optical source and integrated devices in the SMF network is higher than MMF. Generally, the laser diode equipment itself costs 1.5 to 5 times higher than the LED diodes. Also, SMF may demand an additional cost of amplifiers, and system maintenance, therefore the overall cost deployment for SMF is higher than MMF.

Application compatibility

Compatibility with several applications makes one of the differentiating factors for SMF and MMF.
The SMFs are used for long-distance optical fiber networks where the signal strength is expected to retain the highest. Common applications of SMFs are campus fiber optic connections, undersea fiber-optic connections and remote office connections, etc.
The MMFs are largely used fiber optic cables. These are used for CCTV optic fiber connection, video/audio/multimedia transmission, telecom connections, LANs, etc.

Our Factory

Futong Group Import and Export Co., Ltd. is a subsidiary of Futong Group.
Founded in 1987 and headquartered in Hangzhou, Zhejiang Province, Futong Group Co., Ltd. (hereinafter referred to as "Futong Group"), is one of the top 500 enterprises in China and one of the top 500 private enterprises in China. It mainly dedicates in the development of electronic information, energy and power transmission technology and highly purified oxygen-free metal new material technology with more than 10000 employees.
As a builder of global information superhighway and a major provider of global Internet information basic transmission materials, Futong Group takes technological innovation and technological leadership as its competitive advantages, and takes optoelectronic composite cable, sensing optical fiber, high-temperature superconducting cable, and submarine cables as its research and development direction. As the Chinese standard setter of optical fiber preform and optical fiber technology, Futong Group has established a national enterprise technology center and a postdoctoral research workstation. It has won the second prize of National Scientific and Technological Progress Award, the first prize of Chinese Electronic Information Science and Technology Award, and the major technological invention award in national information industry.

Certificate

productcate-1-1

FAQ

Q: Why not always use single-mode fiber?

A: Single-mode connections require greater care and skill to terminate, which is why components are often pre-terminated at the factory. On the other hand, multimode connections can be easily performed in the field, offering installation flexibility, cost savings and peace of mind.

Q: How far can you run single-mode fiber?

A: Single-mode fibre can go as far as 40 km or more without hurting the signal, making it ideal for long-haul applications.

Q: What is the acceptable loss of single-mode fiber?

A: In general, the acceptable loss range is typically between 0.2 dB/km to 0.5 dB/km for single-mode fibers, and 2 dB/km to 3 dB/km for multimode fibers. These values represent the maximum allowable loss per kilometer of fiber.

Q: Can you use single-mode fiber for short runs?

A: Single mode fiber is suitable for long-distance, high-bandwidth applications, while multimode fiber is more cost-effective for short-distance, lower-bandwidth applications.

Q: What does single-mode fiber not suffer from?

A: 8.11.2.3.
As single-mode transmissions avoid modal dispersion, modal noise, and other effects that occur with multimode transmissions, single-mode fibers can carry signals at considerably higher speeds as compared to multimode fibers.

Q: What speed can single-mode fiber handle?

A: Single Mode fiber optic bandwidth is theoretically limitless, and boundaries are being pushed in lab conditions every year. It all depends on the capacity of the transceiver and receiver and the standard and quality of the cable. The highest capacity for commercial Single Mode Fiber now is 100 Gigabits per second.

Q: How far can 40G single-mode fiber reach?

A: 6.2 miles
However, in general, 40G single mode fiber can reach distances of up to 10 kilometers (6.2 miles) without the need for any signal regeneration or amplification.

Q: Which is better single mode or multimode?

A: Bandwidth. Single-mode fibers have a higher bandwidth capability than multimode fibers due to no modal dispersion effects, which means that they can transmit larger amounts of data over great distances.

Q: What is a good dB for single-mode fiber?

A: For single mode fiber connectors, the acceptable dB loss typically ranges from 0.1 dB to 0.5 dB. However, it is essential to note that lower dB loss is always preferred as it ensures better signal transmission and higher network performance.

Q: What are good light levels for single-mode fiber?

A: Single mode fiber is used to transmit 1270 - 1625 nm light over long distances and high data rates, most commonly at 1310 and 1550 nm.

Q: What is the cut-off frequency for single-mode fiber?

A: International standard specifies cabled cut-off wavelength < 1260 nm for dispersion- unshifted single-mode fiber, which is well below the typical operational wavelength of 1310 nm (refer Table 1).

Q: Can single-mode fiber bend?

A: Single-mode fiber has a higher critical bending radius than multimode fiber. This is because single-mode fiber cable has a smaller core and is made from pure glass. This makes it more resistant to bending.

Q: What is the maximum length of single mode fiber optic cable?

A: 40-100 kilometers
In general, single-mode fiber optic cables can transmit data over longer distances compared to multi-mode cables. Single-mode cables can typically achieve distances of up to 40-100 kilometers (25-62 miles) without the need for signal regeneration or amplification.

Q: What is the shortest distance for single-mode fiber?

A: The lack of a specific minimum distance for single-mode fiber means that it can be used for both short and long-distance applications. It is commonly used for distances ranging from a few kilometers to hundreds of kilometers, and even beyond.

Q: What is the most common use of single mode fiber optic cable?

A: This allows single-mode fiber cable to transmit over distances up to 62 miles or more, and with virtually unlimited bandwidth. Applications include longer distance LANs, telephony and cable TV, although it is used in data centers as well.

Q: Can single mode fiber transmit and receive simultaneously?

A: Yes, single mode fiber can support full-duplex transmission. Full-duplex transmission refers to the ability to transmit and receive data simultaneously over the same medium. Single mode fiber is designed to carry a single mode of light, allowing for higher speeds and longer distances compared to multi-mode fiber.

Q: Are there different types of single mode fiber?

A: Single Mode Fiber: Types and Applications
Single Mode Fiber Types: OS1 vs OS2
OS2 fiber is more suitable for outdoor applications including backhaul networks, external plants, FTTH, WDM/DWDM network, etc., where the maximum distance is up to 200 km.

Q: What is the maximum attenuation for single mode fiber?

A: The typical loss values for intrinsic attenuation for single-mode fibers are approximately 0.40 dB/km at 1310 nm and 0.30 dB/km at 1550 nm. For multimode fibers, the values are a bit higher around 3.50 dB/km at 850 nm and 1.50 dB/km at 1300 nm.

Q: Can single-mode fiber run 100G?

A: Single-mode fiber cables support 40G and 100G transmission up to a distance of 10 km/6.2 miles. On the other hand, multi-mode fiber cables support short-distance transmission. Only OM3, OM4, and OM5 cables support 40G and 100G transmission.

Q: How far can single-mode fiber go for 10Gb?

A: The distance of single-mode fiber for 10Gb transmission can vary depending on various factors such as the quality of the fiber, the type of equipment used, and the transmission technology employed. However, in general, single-mode fiber can support distances of up to 40 kilometers (24.85 miles) for 10Gb transmission.

We're well-known as one of the leading single mode optical fiber manufacturers and suppliers in China. Please feel free to buy customized single mode optical fiber made in China here from our factory. Contact us for more details.

G 657A1 Compatible G 652D, G 654E, G.657A1