5 May 2010 Fast-switching frequency-converted laser light source for display applications
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We report a passively Q-switched two-component visible laser light source based on frequency conversion. The device consists of a monolithic single transverse mode ridge-waveguide infrared laser diode and a waveguide-type periodically poled magnesium oxide doped lithium niobate crystal for second harmonic light generation. An integrated 45-degree folding mirror and a coupling lens are formed by etching on opposite sides of the monolithic gallium arsenide -based laser diode for coupling the infrared emission into the waveguide-type nonlinear crystal for efficient single pass frequency conversion. Passively Q-switched operation is realized by an integrated electro-absorber section coupled with the in-plane multi-quantum well gain structure. Stable high-repetition rate self-pulsating operation was achieved by reverse-biasing the electro-absorber section and reduced speckle visibility of the second harmonic light was observed when compared to continuous-wave operation of the same laser.
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J. Konttinen, J. Konttinen, P. Tuomisto, P. Tuomisto, T. Vallius, T. Vallius, T. Jouhti, T. Jouhti, "Fast-switching frequency-converted laser light source for display applications", Proc. SPIE 7723, Optics, Photonics, and Digital Technologies for Multimedia Applications, 77230T (5 May 2010); doi: 10.1117/12.851384; https://doi.org/10.1117/12.851384

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