Dual wavelength semiconductor laser source for optical pickup
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsSusumu Koike, Kenichi Matsuda
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Abstract
The dual wavelength semiconductor laser source for an optical pickup includes: two semiconductor laser elements outputting laser beams having oscillating wavelengths different from each other; and a multiplexing waveguide, formed inside of a photonic crystal having a photonic band gap, having one output end outputting laser light at one end surface and two input ends at the other end surfaces. Output beams of the two semiconductor laser elements are coupled to the respective two input ends of the multiplexing waveguide and the two beams are outputted from the one output end of the multiplexing waveguide.
Claims9
A dual wavelength semiconductor laser source for an optical pickup comprising:
- two semiconductor laser elements outputting laser beams having oscillating wavelengths different from each other;
- and
- a multiplexing waveguide, formed inside of a photonic crystal having a photonic band gap, having one output end outputting laser light at one end surface and two input ends at the other end surfaces,
- wherein output beams of said two semiconductor laser elements are coupled to said respective two input ends of said multiplexing waveguide and said two beams are outputted from said one output end of said multiplexing waveguide.
A semiconductor laser source for an optical pickup comprising:
- plural semiconductor laser elements;
- and
- a multiplexing waveguide, formed inside of a photonic crystal having a photonic band gap, and having one output end outputting laser light at one end surface and plural input ends at the other end surfaces,
- wherein output beams of said plural semiconductor laser elements are coupled to respective plural input ends of said multiplexing waveguide to output output beams from said one output end of said multiplexing waveguide in a multiplexed state.
Dependencies are inferred from the claim text.