Patent ID: 7242698
Filing Date: 2007-07-10
Classification: H01S

Abstract:
1. A laser being tunable in wavelength, comprising: a first reflecting unit and a second reflecting unit, both reflecting units being arranged to at least partially reflect an incident beam of electromagnetic radiation towards each other, an optical path of said beam of electromagnetic radiation within a cavity defined in length by said first and second reflecting units, a dispersive device arranged such that a portion of said optical path of said beam of electromagnetic radiation traverses through said dispersive device, wherein said dispersive device comprises a dispersive characteristic representing a functional dependence of an optical path length of said portion with respect to wavelength of said electromagnetic radiation, wherein said optical path length increases with an increasing wavelength of said electromagnetic radiation, and a gain medium for generating said electromagnetic radiation, said gain medium comprising a back facet, which is identical to said first reflecting unit, and a front surface, said gain medium emitting said beam through said front surface towards said second reflecting unit.