Wavelength determining apparatus and method

Details Wavelength determining apparatus and method Wavelength determining apparatus and method

2006-01-31

2006-01-31

Lee, Hwa(Andrew) (Department: 2877)

Optics: measuring and testing

By light interference

Reexamination Certificate

active

06992774

ABSTRACT:
An apparatus for determining the wavelength of light emitted by, for example, a laser, includes three photodiodes. One photodiode receives a proportion of the light redirected from the main optical path by a beam splitter. A second photodiode receives a proportion of the light redirected from the main optical path by the beam splitter and passing through a broadband filter. A third photodiode receives light that has been caused to interfere by an interferometric device. The ratio of the light intensities at the first and second photodiodes provide a coarse determination of wavelength, when compared to a lookup table, and the ratio of the light intensities at the first and third photodiodes provide a more exact determination of the wavelength.

REFERENCES:
patent: 4309671 (1982-01-01), Malyon
patent: 5825792 (1998-10-01), Villeneuve et al.
patent: 6144025 (2000-11-01), Tei et al.
patent: 6259712 (2001-07-01), DeCain et al.
patent: 6369951 (2002-04-01), Spanner
patent: 6714309 (2004-03-01), May
patent: 6885462 (2005-04-01), Lee et al.
patent: 4114407 (1992-11-01), None
patent: 1099943 (2001-05-01), None
Patent Abstracts of Japan, Publication No. 05340839.

Affiliated with

Also associated with

Rating

Wavelength determining apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wavelength determining apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wavelength determining apparatus and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3601914