Multielectrode distributed feedback laser for pure frequency modulation and chirping suppressed amplitude modulation

Journal Article · Wed Apr 01 04:00:00 EST 1987 · J. Lightwave Technol.; (United States)

DOI:https://doi.org/10.1109/JLT.1987.1075540· OSTI ID:6223266

Yoshikuni, Y; Motosugi, G

A new concept for operation of distributed feedback lasers with multielectrodes is proposed, and its capability for amplitude or frequency modulation is demonstrated. The device has electrically separated electrodes so that carrier density distribution along the laser cavity can be controlled artificially by adjusting the current distribution for each electrode. The lasing frequency can be controlled by changing the current ratio applied to the electrodes. Frequency modulation experiments disclose that neither frequency modulation efficiency nor phase delay depend on modulation frequency. It turned out that the frequency shift under modulation showed blue shift or red shift, depending on bias current distribution and the position of the modulation applied electrode. Using these characteristics, chirping suppressed amplitude modulation and frequency modulation with constant output power are realized. 22 references.

• Research Organization: Nippon Telegraph and Telephone Public Corp., Japan
• OSTI ID: 6223266
• Journal Information: J. Lightwave Technol.; (United States), Journal Name: J. Lightwave Technol.; (United States) Vol. LT-5; ISSN JLTED
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ARSENIC COMPOUNDS
ARSENIDES
CARRIER DENSITY
DIFFERENTIAL EQUATIONS
EQUATIONS
FEEDBACK
FREQUENCY MODULATION
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
INDIUM COMPOUNDS
INDIUM PHOSPHIDES
LASER CAVITIES
LASERS
MODULATION
PARTIAL DIFFERENTIAL EQUATIONS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PNICTIDES
WAVE EQUATIONS