Patent ID: 8804787
Filing Date: 2014-08-12
Classification: H01S

Abstract:
1. A laser system, comprising: a semiconductor laser having a laser driver coupled thereto; wherein an output of said semiconductor laser is optically coupled to an input of an optical splitter that provides outputs including or coupled to a first branch having a first branch fiber coupled to a feedback reflector which provides a cavity boundary that defines a passive secondary cavity for said semiconductor laser, and a second branch including a back reflection reduction device, wherein a roundtrip attenuation from an output facet of said semiconductor laser to said feedback reflector is from −30 dB to −80 dB; wherein said laser driver provides sufficient drive stability so that a frequency variation of said semiconductor laser is less than a free spectral range (FSR) of said secondary cavity, and wherein an output of said system is taken after said back reflection reduction device.