Title :
Phase-Conjugate External-Cavity Diode Laser
Author_Institution :
Metrol. Res. Inst., Helsinki
Abstract :
An external-cavity diode laser based on self-pumped phase-conjugate optical feedback is reported. An antireflection-coated diode laser is subjected to strong phase-conjugate feedback from a photorefractive Ce-doped BaTiO3 crystal. This provides narrow laser linewidth and good stability. Inherent linewidth of 25 kHz and relative frequency stability of 1.5times10-8 (at 100 s) are demonstrated. Due to phase-conjugate feedback, the laser is insensitive to mechanical drifts and misalignment of the feedback element
Keywords :
barium compounds; cerium; laser cavity resonators; laser feedback; laser stability; optical phase conjugation; optical pumping; photorefractive materials; semiconductor lasers; spectral line narrowing; 100 s; 25 kHz; BaTiO3:Ce; antireflection coating; external-cavity diode laser; laser stability; narrow laser linewidth; optical feedback; optical phase conjugation; photorefractive Ce-doped BaTiO3 crystal; relative frequency stability; self pumping; Diode lasers; Frequency; Laser beams; Laser feedback; Laser stability; Lenses; Optical feedback; Photorefractive materials; Semiconductor laser arrays; Semiconductor lasers; Phase conjugation; semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.883294
