Patent ID: 8891563

Claim:
OPS-laser apparatus, comprising: a first OPS-chip including a first multilayer semiconductor gain-structure surmounting a mirror-structure; a second OPS-chip including a second multilayer semiconductor gain-structure surmounting a second mirror-structure; an end-mirror; a partially reflecting partially transmitting beam-splitter, said beam splitter not relying on polarization or wavelength discrimination for splitting the radiation generated by the first and second OPS-chips; a first laser-resonator formed between the first mirror-structure and the end mirror and including the first multilayer gain-structure; a second laser-resonator formed between the second mirror-structure and the end mirror and including the second multilayer gain-structure, the first and second laser-resonators being combined on a common path between the beam-splitter and the end mirror and wherein, when the first and second gain structures are energized by optical pump radiation, the first and second resonators generate laser-radiation at the same fundamental wavelength and with the same polarization orientation and wherein the first and second resonators have different lengths and wherein the resonators do not include a spectrally selective element for selecting the fundamental wavelength of the laser-radiation generated by the laser-resonators and wherein the fundamental wavelength radiation is either delivered as the output of the apparatus or used in a frequency conversion process to output harmonic radiation.