Title :
Frequency stabilization of an external cavity laser diode using electrooptic effect
Author :
Lee, Seong-Ho ; Jhee, Yoon-Kyoo ; Shin, Sang-Yung
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
fDate :
3/1/1992 12:00:00 AM
Abstract :
An external cavity laser diode, which consists of a LiNbO/sub 3/ phase modulator, was frequency-stabilized to a resonance frequency of a Fabry-Perot interferometer using the electrooptic effect. The optical frequency fluctuation was detected through a Fabry-Perot interferometer and the detected signal was negatively fed back to the phase modulator to reduce the frequency fluctuation. The rear facet of the electrooptic phase modulator was coated with gold and used as an external mirror. At feedback-off state, the peak-to-peak frequency fluctuation of the laser diode was 52 MHz in 2 min. At feedback-on state, the peak-to-peak frequency fluctuation was reduced to 1.5 MHz. This condition was maintained for the duration of the observation, 1 h and 40 min.<>
Keywords :
electro-optical devices; feedback; fluctuations; laser accessories; laser cavity resonators; laser frequency stability; lithium compounds; mirrors; optical modulation; phase modulation; semiconductor junction lasers; 100 mins; Au coatings; Fabry-Perot interferometer; LiNbO/sub 3/ phase modulator; detected signal; electrooptic effect; electrooptic phase modulator; external cavity laser diode; external mirror; feedback-off state; feedback-on state; frequency-stabilized; negative feedback; optical frequency fluctuation; peak-to-peak frequency fluctuation; rear facet; resonance frequency; Diode lasers; Electrooptic effects; Fabry-Perot interferometers; Fluctuations; Optical interferometry; Phase detection; Phase frequency detector; Phase modulation; Resonance; Resonant frequency;
Journal_Title :
Photonics Technology Letters, IEEE
