Title :
Lightwave synthesizer with lock-in-detected frequency references
Author :
Ishida, Osamu ; Toba, Hiromu
Author_Institution :
NTT Transmission Syst. Lab., Kanagawa, Japan
fDate :
10/1/1991 12:00:00 AM
Abstract :
The authors describe a lightwave synthesizer system based on the lock-in detected frequency references such as atomic or molecular spectra. This system uses two semiconductor laser diodes (LDs); one is a frequency-tunable master LD, and the other is a frequency-modulated tracking LD, used for stabilizing and tuning the master LD. The lightwave-frequency tuning of the master LD is controlled by a microwave synthesizer. This yields the same frequency stability and accuracy as the lock-in-detected frequency reference at anywhere in the tuning range. By using the 1535.39-nm absorption line of acetylene (C2 H2) gas as the reference, tuning range of over 13 GHz with an absolute frequency stability of better than 10 MHz is demonstrated from distributed-Bragg-reflector LD
Keywords :
distributed Bragg reflector lasers; frequency modulation; frequency synthesizers; infrared spectra of organic molecules and substances; laser frequency stability; laser tuning; molecular spectra; optical communication equipment; optical modulation; organic compounds; oscillators; semiconductor junction lasers; 1535.39 nm; DBR laser diodes; absolute frequency stability; absorption line; acetylene; atomic spectra; distributed-Bragg-reflector LD; frequency-modulated tracking LD; frequency-tunable master LD; laser frequency stability; laser tuning; light absorption; lightwave oscillators; lightwave synthesizer system; lightwave-frequency tuning; lock-in-detected frequency references; microwave synthesizer; molecular spectra; semiconductor laser diodes; tuning range; Diode lasers; Distributed Bragg reflectors; Frequency modulation; Frequency synthesizers; Laser tuning; Master-slave; Optical control; Optical feedback; Optical sensors; Stability;
Journal_Title :
Lightwave Technology, Journal of
