S. Kittaka

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Binary gratings with high first-order transmission diffraction efficiency were covered with a thin SiO₂ film without the filling in the grooves by plasma enhanced chemical vapor deposition. The diffraction efficiencies of about 90% were attained for transverse-electric (TE) and transverse-magnetic (TM) polarized lights at a wavelength of 1.55 µm(More)
We demonstrated phase-locking in a laser-diode-array-pumped Nd:YVO₄ laser array (15 emitters) using a Talbot cavity. The Nd:YVO₄ slab crystal was coated by dielectric material for claddings and formed a planar waveguide for the vertical mode. To stabilize the horizontal array mode, periodical thermal lenses were generated by controlling the heat flow. The(More)
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