Title :
Laser-power stabilization using a quantum-well modulator
Author :
Shoop, Barry L. ; Pezeshki, Bardia ; Goodman, Joseph W. ; Harris, James S., Jr.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA, USA
Abstract :
A novel method for laser-power stabilization using a multiple quantum-well reflection electroabsorption modulator with a Fabry-Perot cavity is demonstrated. Stable operation of the modulator produces a linear relationship between control current and optical absorption which permits the realization of noninterferometric optical subtraction and the implementation of a negative feedback architecture. Using this stabilization technique and a modulator with a 70% reflectivity change, intensity noise as large as +or-75% of the incident level can be eliminated from a noisy laser beam.<>
Keywords :
electro-optical devices; electroabsorption; feedback; laser accessories; laser cavity resonators; optical modulation; sapphire; semiconductor quantum wells; solid lasers; titanium; Fabry-Perot cavity; MQW; Ti:sapphire laser; control current; intensity noise; laser-power stabilization; linear relationship; modulator stability; multiple quantum-well reflection electroabsorption modulator; negative feedback architecture; noisy laser beam; noninterferometric optical subtraction; optical absorption; quantum-well modulator; reflectivity change; Fabry-Perot; Laser feedback; Laser stability; Noise level; Optical control; Optical feedback; Optical modulation; Optical noise; Optical reflection; Quantum well lasers;
Journal_Title :
Photonics Technology Letters, IEEE
