This study focuses on the realization of Fiber-Optic network's stabilization light source which is increasingly necessary according to the construction of the current high speed communication network. The stabilization light source is being used as an optical source in constructing the various Fiber-Optic networks, and developing the communication parts. And the light source consists of LED(light emitting diode) and Laser(light amplification by stimulated emission of radiation). LED has some merits, which are cheap and easy to treat, however the output is comparably small. And LED has some restrictions for transmitting the long distance because of broad line width. However, Laser, which has narrow line width and high output, is being used for transmitting the long distance and for the various LED and systems. This study develops the light source using Laser which is essential for the construction of communication networks as well as for the production and inspection of the communication parts. Considering for the portable, the stabilization light source, is developed light and easy to use, which has a structure using a small battery. As a result of an evaluation for the developed parts this study comes to know that an outstanding characteristic was realized because an accidental error occurred within ± 0.1[dB] not only in the characteristic of the initial motion but also in the 10 hour long operation. built-in.

This paper studies the non-cutting optical fiber transmission tester, which can test the abnormality in the optical fiber core. The basic testing method, in the case of abnormality on the lines, can estimate the loss and other abnormalities by using optical power meter and stabilized laser source of light. The optical measurement wavelength of the system is the wavelength for communication of 1310, 1550nm, and can, in checking the abnormality on the communication lines, measure the optical in order not to affect the existing data communication network with the maximum loss of 0.5dB only. The break down can be diagnosed with the naked eyes by having red laser diode with optical power of 0.5mW(-3dBm) built-in.

The optical reflection and the insertion loss department measurement system are composed of the optical direction coupler which is deriving the optical transmission of a message part and reflected light to the department of sphere optical. The optical technology that can measure microscopic optical to the present 0~ -60㏈m and the technology that can derive the stable laser are guaranteed, and in a mass production step, the uniformity part is a problem that should be solved for measuring the different optical spare parts, and the part can be solved sufficiently through the algorithm of repeat error modification and moving average arithmetic way. In this paper, the source used the distributed feedback laser diode when λ = 1310㎚, λ = 1550㎚, and the receiving optical department used InGaAs pin photo diode. The measurement scope was 0 ~ - 60㏈m for the optical reflection loss and insertion loss, and the disjointing was 0.01㏈, and the stability displayed 0.1㏈/h.