Title :
Spectral characteristics for 1.5 µm DBR laser with frequency-tuning region
Author :
Murata, Shigeru ; Mito, Ikuo ; Kobayashi, Kohroh
Author_Institution :
NEC Corp., Kawasaki, Japan
fDate :
6/1/1987 12:00:00 AM
Abstract :
A 1.5 μm frequency-tunable distributed Bragg reflector (DBR) laser was developed. Frequency tuning was performed by injecting current into the DBR region where the refractive index was reduced to result in the Bragg frequency change. Threshold current and external quantum efficiency were 16 mA and 26 percent, respectively. The maximum continuous wavelength tuning range was 1.03 nm ( = 136 GHz). Spectral linewidth was maintained at an almost constant value when the wavelength was tuned. Large frequency modulation (FM) efficiency of 1-3 GHz/mA and flat FM response up to a few hundred MHz were obtained.
Keywords :
Distributed Bragg reflector lasers; Frequency-division multiplexing (FDM); Laser tuning; Optical fiber transmitters, lasers; Distributed Bragg reflectors; Etching; Fiber lasers; Frequency division multiplexing; Frequency modulation; Laser modes; Laser tuning; Refractive index; Semiconductor lasers; Threshold current;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.1987.1073440
