Patent ID: 7167490
Filing Date: 2007-01-23
Classification: H01S

Abstract:
1. A laser system, comprising: a laser element having a laser signal output, the wavelength profile of which changes with a change in operating conditions; a gain medium having an absorption, optically coupled to be pumped by the laser element; and a wavelength-selective stabilizing reflective filter in line with the laser for receiving the laser signal, said reflective filter having a reflectivity profile having reflectivity peaks at two predetermined spaced wavelengths, wherein substantially most of the absorption of the gain medium is between or about the peaks of the wavelength selective reflective filter wavelength, the reflective filter being partially reflective at said different predetermined reflective spaced wavelengths and substantially less reflective in a wavelength band there between, and providing optical feedback of a portion of the laser signal to the laser element that wavelength-stabilizes its output, a degree of reflectivity at said predetermined wavelengths and a relative wavelength separation between the predetermined spaced wavelengths being such that throughout the change in operating conditions, output power of the laser element is concentrated at one or more of the reflector center wavelengths, with regions of negligible output power at wavelength sections between the reflector center wavelengths, wherein the laser system is without active cooling.