Light source device for frequency division multiplexed optical c

Details Light source device for frequency division multiplexed optical c Light source device for frequency division multiplexed optical c

1997-08-26

2000-07-18

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359187, H04J 1402

Patent

active

060915269

ABSTRACT:
The object of the invention is to offer a light source device for frequency division multiplexed optical communications having a compact size and reduced cost. Light source units 100-300 output light having optical frequencies which oscillate at mutually different modulation frequencies centered about mutually different optical frequencies. Optical splitters 1-3 split the output light from each light source unit into two parts. An optical multiplexer-splitter 4 multiplexes and splits the output light from the optical splitters. The Fabry-Perot etalon resonator 5 transmits each component of the output light from the optical multiplexer-splitter 4 at a specific transmission rate corresponding to each optical frequency. A light receiving element 6 converts the output light from the Fabry-Perot etalon resonator 5 into an electrical signal, and a light receiving element 7 converts the output light from the optical multiplexer-splitter 4 into an electrical signal. A transmission change sensing unit 400-600 is provided for each light source unit, and senses the change in transmission of the Fabry-Perot etalon resonator at the optical frequency of the corresponding light source unit. A CPU 8 controls each light source unit by feedback such as to maximize the output of each transmission change sensing unit.

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patent: 5861975 (1999-01-01), Sakuyama et al.
patent: 5920414 (1999-07-01), Miyachi et al.

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