Wavelength selective light source using Bragg-grating

Details Wavelength selective light source using Bragg-grating Wavelength selective light source using Bragg-grating

2002-12-23

2004-01-27

Scott, Jr., Leon (Department: 2828)

Optical: systems and elements

Optical frequency converter

Dielectric optical waveguide type

C359S326000, C385S024000, C372S064000, C372S102000

Reexamination Certificate

active

06683711

ABSTRACT:

TECHNICAL FIELD
The present invention relates to wavelength selective light sources, and more particularly, to a wavelength selective light source using a switched Bragg-grating.
BACKGROUND
Wavelength-division multiplexed (WDM) networks carry information using multiple wavelengths. WDM systems, as well as test and measurement of WDM systems and components, require a method and apparatus for producing electromagnetic energy at many different frequencies. One method of accomplishing this is to have multiple lasers, each laser manufactured specifically to produce an output at a specific wavelength. Another desirable option is to have a single laser that is tunable to provide an output that has a variable wavelength, depending upon a control signal. These are referred to as multi-frequency lasers or tunable lasers. An example of such is shown in U.S. Pat. No. 6,243,402 to Doerr and U.S. Pat. No. 5,949,801 to Tayebati. These prior art wavelength variable light sources are relatively complex and suffer from various other disadvantages.


REFERENCES:
patent: 5712937 (1998-01-01), Asawa et al.
patent: 5949801 (1999-09-01), Tayebati
patent: 6014482 (2000-01-01), Laude
patent: 6243402 (2001-06-01), Doerr
patent: 6246816 (2001-06-01), Moore et al.
patent: 6608715 (2003-08-01), Zhang et al.
patent: 2002/0006250 (2002-01-01), Wedding
patent: 2002/0159705 (2002-10-01), Naniwae
(No Author) “Tunable Lasers: Lasers than can be adjusted to emit one of several different wavelengths,” Light Reading, Aug. 1, 2001. http://www.lightreading.com/document.asp?doc_id=3308&print=true (printed Jun. 20, 2002).
(No Author) “Vertical Cavity Surface Emitting Lasers (VCSELs): Lasers that emit light from their surface in contrast with regular ‘edge emitters’,” Light Reading, Aug. 2001. http://www.lightreading.com/document.asp?doc_id=3307&print=true (printed Jun. 20, 2002).
(No Author) “Distributed Feedback (DFB) Lasers: Lasers giving out a very sharply defined color of light,” Light Reading, Aug. 2001. http://www.lightreading.com/document.asp?doc_id=3306&print=true (printed Jun. 20, 2002).

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