In a fiber optic system, transmitter, optic fiber and receiver are necessary for dada transmission. A light source plays a significant par in a telecommunication maintenance system. An optical light source that modulated by a suitable drive circuit in accordance with the signal is needed in the transmitter to accomplish the transmission work.

Optical Light Source is a handheld optical light source, newly released in 2007. It can provide1~7 wavelengths, 650/850/1300/1310/1490/1550/1625nm, output to satisfy specific requirements including the 650nm visible light source and the 1310/1550nm wavelengths for single mode fiber or the 850/1300nm wavelengths for multimode fiber, as well as other wavelengths according to customer’s needs.

An optical light source is used together with the optical power meter, they act as an economic and efficient solution for the fiber optic network works.?An fiber light source is widely used in fiber networking application like Maintenance in Telecom Maintenance, CATV, Fiber Optic Lab Testing and other Fiber Optic Measurements. For high speed fiber?optic communication systems, which operate at speed higher than 1 Gbit/s, the selection of light source is even more critical.

First, the selected fiber light source must be able to emit a wavelength corresponding to low loss window of the most common optic fiber material, fused silica, namely 1.3um and 1.5um windows.
Second, the optical light source must have the high speed digital modulation ability. That is because with the current fiber optic communication systems reached operation speed up to 100Gb/s, the optic light source is required to be modulated at speed in excess of 2.5Gb/s. Currently, two methods are developed to meet this requirements, one is to use a LiNbO3 external modulator, in which the light source is required to give steady power output, another is to directly modulate the light source at the speed desired.
Lastly, the small spectral linewidth of the source is the third important characteristic of the light source, which significantly affects the magnitude of dispersion which is directly proportional to the linewidth of the source.

Light sources of the fiber light source are offered in a variety of types. Basically there are two types of semiconductor light sources available for fiber optic communication - The LED sources and the laser sources.

LED light source is a semiconductor diode with a p region and an n region. When the LED is forward biased, current flows through the LED. As current flows through the LED, the junction where the p and n regions meet emits random photons. This process is referred to as spontaneous emission. LEDs are also used in many other applications except fiber optic communication, such as aviation lighting, automotive lighting, and traffic signals, etc.
The laser is a semiconductor diode with a p and an n region which is similar with LED, but the difference is that, the laser has an optical cavity that contains the emitted photons with reflecting mirrors on each end of the diode. One of the reflecting mirror is only partially reflective. This mirror allows some of the photons to escape the optical cavity. The VCSEL(vertical-cavity surface- emitter laser) is the most popular laser source of high-speed networking, in which the semiconductor diode combines high bandwidth with low cost and is an ideal choice for the gigabit networking options.

As one of the main suppliers of fiber light source in China, Ingellen provides both type of fiber optic light sources with different working wavelengths. These fiber optic light sources features compact size, light weight, high stable output power and large display window and easy operation. For more details about the fiber optic light source catalogues of Ingellen, welcome to go the Fiber Light Source Page.