Optical transmitter output monitoring tap

Details Optical transmitter output monitoring tap Optical transmitter output monitoring tap

1997-12-04

2000-09-26

Chan, Jason

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359177, 385 48, H04B 1000, H04B 1004, H04B 1008

Patent

active

061249564

ABSTRACT:
An optical arrangement for full duplexed PON outstation transceivers (single fibber operation) which improves control of optical output power during marshalling by reducing the light level at which closed loop control can be used. The arrangement uses a beam-expanded region incorporating a bulk-optics beam-splitter with a reflective field stop that will tap a higher proportion of the basestation transmitter power when it is operating below lasing threshold and hence has a larger beam size than when operating above threshold.

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