Dual wavelength semiconductor laser source for optical pickup

Details Dual wavelength semiconductor laser source for optical pickup Dual wavelength semiconductor laser source for optical pickup

2005-09-06

2005-09-06

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S045000, C398S082000, C398S091000

Reexamination Certificate

active

06941046

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.

REFERENCES:
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Chutinan et al., “Highly confined waveguide bends in three-dimentional photonic crystal”, Applied Physics Letters, vol. 75, No. 24, Dec. 13, 1999, pp. 3739-3741.

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