Patent ID: 7599408

Claim:
A tunable laser source comprising: a first laser source to generate a low power continuous wave laser light having a wavelength λ 1 ; a second laser source to generate a low power continuous wave laser light having a wavelength λ 2 ; a pump laser source to generate a high power pulsed laser light having a wavelength λ 0 ; a first optical parametric amplifier (OPA), the first OPA receives the laser light having a wavelength λ 1 and the laser light having a wavelength λ 0 and generates a high power pulsed laser light having a wavelength λ 1 ; a second optical parametric amplifier (OPA), the second OPA receives the laser light having a wavelength λ 2 and the laser light having a wavelength λ 0 and generates a high power pulsed laser light having a wavelength λ 2 ; and a difference frequency generator (DFG), the OFO receives the high power pulsed laser light having a wavelength λ 1 and the high power pulsed laser light having a wavelength λ 2 and provides a high power pulsed laser light having a wavelength λ 3 wherein λ 3 =λ 1 *λ 2 /(λ 2 −λ 1 ).