Title :
Novel wavelength-tunable active-filter-type laser diodes
Author :
Horita, Masayoshi ; Utaka, Katsuyuki ; Matsushima, Yuichi
Author_Institution :
KDD R&D Labs., Saitama, Japan
fDate :
6/1/1991 12:00:00 AM
Abstract :
A wavelength-tunable laser diode which utilizes an active transmission filter of a λ/4-shifted grating is proposed. 0.95-nm continuous tuning and 5.2-nm quasi-continuous tuning were achieved. Spectral linewidths ranged from 20 to 40 MHz during the tuning. The device structure and the operational principle are described. After a description of the fabrication, the device characteristics, including injection current versus light output, wavelength tuning, linewidth, and FM response, are presented. A flat FM response with large efficiency was obtained
Keywords :
diffraction gratings; laser tuning; optical filters; semiconductor junction lasers; FM response; active transmission filter; continuous tuning; fabrication; injection current; light output; linewidth; operational principle; quarterwave shifted grating; quasi-continuous tuning; spectral linewidths; wavelength-tunable active-filter-type laser diodes; Active filters; Broadband communication; Diode lasers; Distributed Bragg reflectors; Distributed feedback devices; Gratings; Laser feedback; Laser tuning; Resonance light scattering; Tunable circuits and devices;
Journal_Title :
Quantum Electronics, IEEE Journal of
