Title :
A thermally stable Fabry-Perot tunable filter for 1 AA-spaced high-density WDM systems
Author :
Ogusu, M. ; Shimomura, Y. ; Ohshima, S.
Author_Institution :
Res. & Dev. Center, Toshiba Corp., Kawasaki, Japan
Abstract :
A new tunable filter using two nonidentical Fabry-Perot etalons arranged on a single rotation stage has been demonstrated. The 3-dB passband, tuning range, and insertion loss were 0.2 AA, 1.2 nm, and 1.5 to 3 dB, respectively. The thermally induced wavelength deviation of the output was within 0.02 AA in the range of 0 to 50 degrees C. The sharp wavelength characteristics and the good temperature stability promised to operate FSK-DD stably where the wavelength spacing of FSK signals was 1 AA.<>
Keywords :
frequency shift keying; light interferometers; multiplexing equipment; optical communication equipment; optical filters; optical modulation; stability; tuning; wavelength division multiplexing; 0 to 50 C; 0.2 A; 1.5 to 3 dB; FSK signals; FSK-DD; WDM systems; good temperature stability; high-density; insertion loss; nonidentical Fabry-Perot etalons; sharp wavelength characteristics; single rotation stage; thermally induced wavelength deviation; thermally stable Fabry-Perot tunable filter; tuning range; wavelength spacing; Fabry-Perot; Optical fiber filters; Optical filters; Optical tuning; Passband; Refractive index; Resonance; Temperature distribution; Thermal expansion; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
