Method and device for monitoring light

Details Method and device for monitoring light Method and device for monitoring light

2011-06-07

2011-06-07

Park, Kinam (Department: 2828)

Coherent light generators

Particular beam control device

Optical output stabilization

C372S029020, C372S029014, C372S029011, C372S029010

Reexamination Certificate

active

07957438

ABSTRACT:
A method for monitoring laser light launched into a core of a single mode fiber includes launching a portion of light directly into the cladding about the core. The cladding launched light is a known fraction of the core launched light and can be monitored by placing a detector about the cladding. Detected light including light that was launched into the cladding and has leaked through the cladding is used as a known fraction of light in the core and can be used to control the laser light source. This can be done with a straight section of single mode optical fiber and does not require bending the fiber. Advantageously, most of the core launched light remains in the core as guided light.

REFERENCES:
patent: 6243508 (2001-06-01), Jewell et al.
patent: 6778585 (2004-08-01), Malone
patent: 7146073 (2006-12-01), Wan

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