Title :
128-channel polarization-insensitive frequency-selection-switch using high-silica waveguides on Si
Author :
Takato, Norio ; Sugita, Akio ; Onose, Katsuhide ; Okazaki, Hisaaki ; Okuno, Masayuh ; Kawachi, Masao ; Oda, Kazuhiro
Author_Institution :
NTT Opto-Electron. Lab., Ibaraki, Japan
fDate :
6/1/1990 12:00:00 AM
Abstract :
A 128-channel polarization-insensitive frequency-selection-switch (FS-SW) with 10-GHz frequency spacing is discussed. The FS-SW was fabricated on Si using low-loss GeO/sub 2/-doped high-silica waveguides, and its frequency-insensitive operation was attained by the laser trimming adjustment of a-Si film which controls waveguide birefringence. The fiber-to-fiber loss of the transmitted channel was 6.7 dB in the pigtailed FS-SW and the total crosstalk level was less than -13 dB. By using this FS-SW, a 100-channel optical frequency division multiplexing (FDM) transmission-distribution experiment at 622 M b/s over a 50-km fiber length was achieved.<>
Keywords :
birefringence; crosstalk; integrated optics; optical losses; optical switches; optical waveguides; 128-channel; 50 km; 6.7 dB; 622 Mbit/s; FDM; Si; a-Si film; crosstalk level; fiber length; fiber-to-fiber loss; frequency spacing; high-silica waveguides; laser trimming adjustment; low-loss; optical frequency division multiplexing; pigtailed FS-SW; polarization-insensitive frequency-selection-switch; transmission-distribution experiment; transmitted channel; waveguide birefringence; Birefringence; Fiber lasers; Frequency division multiplexing; Optical control; Optical fiber losses; Optical fiber polarization; Optical films; Optical waveguides; Semiconductor films; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
