Optical module

Details Optical module Optical module

2006-08-16

2008-08-19

Font, Frank G (Department: 2883)

Optical waveguides

With disengagable mechanical connector

Structure surrounding optical fiber-to-fiber connection

C385S073000, C385S088000

Reexamination Certificate

active

07413352

ABSTRACT:
The inventor found that the lightwave of a semiconductor laser includes, in addition to the laser oscillation lightwave, a weak, continuous noise component having a different wavelength (here, referred to as natural emission lightwave). The inventor also found that in the wavelength division multiplexing communication optical system in which signal lightwaves having a plurality of wavelengths are combined to transmit over a single optical fiber so as to be separated at the other end to receive with a plurality of light-receiving devices, the natural emission lightwave causes crosstalk. A natural emission lightwave-blocking filter that reflects a natural emission lightwave is placed on the optical path between the semiconductor laser and the optical fiber. The natural emission lightwave-blocking filter blocks the natural emission lightwave, preventing the crosstalk.

REFERENCES:
patent: 7158552 (2007-01-01), Buchold et al.
patent: 7248618 (2007-07-01), Volodin et al.
patent: 2006/0072632 (2006-04-01), Flanders et al.
patent: 2006/0291772 (2006-12-01), Haiml et al.
patent: 2003-229626 (2003-08-01), None

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