Patent ID: 6266351
Filing Date: 2001-07-24
Classification: H01S,H03B

Abstract:
A generator for producing a low-noise, high-frequency generator output signal, comprising:a monomode first laser having a first free-running frequency and producing light;a second laser having a second free-running frequency and producing a second laser output signal, the first laser being connected via an optical isolator to the second laser, the light produced by the first laser being injected as injected light into the second laser;wherein an intensity of the injected light and a difference between the first free-running frequency and the second free-running frequency are selected so as to prevent the second laser from locking onto the first free-running frequency; andwherein the second laser oscillates during injection at a frequency that is slightly smaller than the second free-running frequency, the second laser output signal exhibiting a substantial modulation depth with a modulation frequency of about the difference between the first free-running frequency and the second free-running frequency.