Title :
Realisation of flat FM response by directly modulating a phase tunable DFB laser diode
Author :
Yamazaki, Shumpei ; Emura, Keita ; Shikada, Masaaki ; Yamaguchi, Masaki ; Mito, I.
Author_Institution :
NEC Corporation, Opto-Electronics Research Laboratories, Kawasaki, Japan
Abstract :
Flat and efficient FM responses in a wide frequency range were obtained by directly modulating the injection current of a 1.3 ¿m phase-tunable DFB-DC-PBH laser diode. The FM response is flat between 1 kHz and 300 MHz, and the nor malised frequency deviation is 1¿3 GHz/mA, which is 5¿10 times larger than that of a conventional laser diode in the several hundred megahertz region.
Keywords :
distributed feedback lasers; frequency modulation; optical modulation; semiconductor junction lasers; DFB double channel BH laser diode; direct modulation; flat FM response; injection current; normalised frequency deviation; phase tunable DFB laser diode; semiconductor laser;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850203
