Title :
Tunable narrow-band light source using two optical circulators
Author :
Takada, K. ; Yamada, H. ; Mitachi, S.
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
Abstract :
We report a tunable narrow-band light source with a spectral width of 0.26/spl plusmn/0.04 nm, a 0-dBm output power, and a reduced background spectrum in the 1.5-μm band, which we have developed for optical low coherence reflectometry. The Rayleigh backscatter signal fluctuations were reduced to within /spl plusmn/0.4 dB by using this source. The source will also be used in a system for measuring optical waveguide circuits. This is because the coherence length is about 1 cm and, by using a fiber-optic depolarizer, the degree of polarization is less than 0.016.
Keywords :
Rayleigh scattering; backscatter; fibre lasers; laser beam applications; laser tuning; light interferometry; light sources; optical circulators; optical fibre filters; reflectometry; spectral line breadth; 1.5 micron; Rayleigh backscatter signal fluctuations; band-pass filter; fibre-optic amplifier; narrow-band light source; optical circulators; optical low coherence reflectometry; tunable light source; Backscatter; Circulators; Coherence; Light sources; Narrowband; Optical fiber polarization; Optical waveguides; Power generation; Reflectometry; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
