Optical module which permits stable laser output

Details Optical module which permits stable laser output Optical module which permits stable laser output

2005-06-28

2005-06-28

Pascal, Leslie (Department: 2633)

Optical communications

Transmitter

Including compensation

C398S196000, C398S197000, C398S201000, C372S032000, C372S029020

Reexamination Certificate

active

06912363

ABSTRACT:
An optical module for use in detecting a plurality of different wavelengths by making use of the multiple wavelength selectivity of an etalon. The optical module includes a semiconductor laser, a lens for converting a beam emitted from the semiconductor laser into a substantially parallel beam, a beam splitter for splitting the converted beam into a reflected beam and a transmitted beam, and a light-receiving element disposed such that one of the split beams is incident thereupon through an etalon, wherein a center of the reflected beam from the etalon occurring as the beam is incident upon the etalon is arranged to return to a region other than a beam-emitting portion of the semiconductor laser.

REFERENCES:
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patent: 2000-012968 (2000-01-01), None
Yoshimitsu Sakai, et al., “Tunable LD Module with Wavelength Detector Using Etalon,” Fujitsu Hokkaido Digital Technology Limited. p. 323.
“Laser Module with Wavelength Locker for WDM System,” Fujitsu.51, 3, pp. 148-151 (May, 2000).
Tsuchida et al., “Improvements in the Short-Term Frequency Stability of AlGaAs DH Laser,” 2334 Transactions of the I.E.C.E. of Japan, vol. E65, No. 1, Jan. (1982), pp. 65-66.
Mullane et al., “Ultrafast Measurements of an SG-DBR Laser with Picosecond time and Nanoetre Wavelength Resolution using a Fabry-Perot Interferometer,” Optoelectronic Research Centre, (1999), pp. 894-895.
Dahmani et al., “Frequency Stabilization of Semiconductor Lasers By Resonant Optical Feedback,” Optical Society of America, vol 12, No. 11, Nov.(1987), pp. 876-878.

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