Photometer

Details Photometer Photometer

2007-06-12

2007-06-12

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

10567446

ABSTRACT:
A photometer includes a spectrometer that extracts a component of a predetermined wavelength band from incident light, a coupler that branches the predetermined wavelength band component into a first direction and a second direction, an optical switch that includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal, an optical amplifier that receives light from the second output terminal and outputs amplified light, which is obtained by amplifying the light, to an incident light receiving section of the spectrometer, and a photodetector that is connected to the first output terminal and detects light.

REFERENCES:
patent: 4138645 (1979-02-01), Parato
patent: 6104477 (2000-08-01), Yoshida et al.
patent: 6646727 (2003-11-01), Saleh et al.
patent: 6727490 (2004-04-01), Medard et al.
patent: 10 -307078 (1998-11-01), None
patent: 2001 -230475 (2001-08-01), None
patent: 2002 - 340673 (2002-11-01), None
English Language Abstract of JP 2002-340673.
English Language Abstract of JP 10-307078.
English Language Abstract of JP 2001-230475.

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