Title :
1.5 μm phase-controlled distributed feedback wavelength tunable optical filter
Author_Institution :
NEC Corp., Tsukuba, Japan
fDate :
6/1/1992 12:00:00 AM
Abstract :
A 1.5-μm phase-controlled distributed feedback wavelength-tunable optical filter is studied. This is the first optical filter which controls the transmissivity (gain) and the transmission wavelength independently. Wavelength tuning range as wide as 43 GHz (3.4 Å) with high constant gain of 27 dB has been achieved. A five-channel wavelength selection with less than -10 dB crosstalk is expected with this filter. This device also operates as a wavelength tunable laser, and the wavelength tuning range as a laser is larger than as a filter. The reason is studied, and it is shown that suppression of the submodes is important to expand the wavelength tuning range
Keywords :
distributed feedback lasers; integrated optics; laser tuning; optical communication equipment; optical filters; 1.5 micron; 27 dB; constant gain; crosstalk; five-channel wavelength selection; phase-controlled distributed feedback wavelength tunable optical filter; submodes; transmission wavelength; transmissivity; wavelength division photonic switching systems; wavelength tunable laser; wavelength tuning range; Band pass filters; Distributed feedback devices; Gratings; Laser tuning; Optical control; Optical filters; Optical tuning; Optical waveguides; Refractive index; Tunable circuits and devices;
Journal_Title :
Quantum Electronics, IEEE Journal of
