Title :
Analysis and design of widely tunable diode-pumped Cr:LiSAF lasers with external grating feedback
Author :
Tsunekane, Masaki ; Ihara, Masahiro ; Taguchi, Noboru ; Inaba, Humio
Author_Institution :
Biophotonics Inf. Lab., Yamagata, Japan
fDate :
7/1/1998 12:00:00 AM
Abstract :
We report theoretical and experimental studies on the tuning characteristics of a diode-pumped single-longitudinal-mode Cr:LiSrAlF 6 laser with external optical feedback from a diffraction grating. The results of theoretical analysis explained the mechanism of wavelength tuning and agreed well with the measured characteristics. The simple relation, which describes the dependence of the threshold power on the reflectivity of the output coupler and on the feedback from the grating, was derived taking account of the wavelength dependence of the Cr:LiSrAlF6 emission cross section. From these results we could optimize the reflectivity of the coupler for achieving broad-band tuning. It was found that the tuning range of 200 nm is possible if the feedback ratio from the grating is increased to 35%
Keywords :
aluminium compounds; chromium; diffraction gratings; laser feedback; laser theory; laser tuning; lithium compounds; optical couplers; optical design techniques; optical pumping; reflectivity; solid lasers; strontium compounds; Cr:LiSrAlF6 emission cross section; LiSrAlF6:Cr; broad-band tuning; diode-pumped single-longitudinal-mode Cr:LiSrAlF6 laser; external grating feedback; external optical feedback; feedback ratio; measured characteristics; output coupler; reflectivity; threshold power; tuning characteristics; tuning range; wavelength dependence; widely tunable diode-pumped Cr:LiSAF lasers; Diodes; Gratings; Laser feedback; Laser theory; Laser tuning; Optical design; Optical feedback; Optical tuning; Reflectivity; Tunable circuits and devices;
Journal_Title :
Quantum Electronics, IEEE Journal of
