Average pitch gratings for optical filtering applications

Details Average pitch gratings for optical filtering applications Average pitch gratings for optical filtering applications

2006-10-31

2006-10-31

Lavarias, Arnel C. (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S900000, C385S014000, C372S102000

Reexamination Certificate

active

07130124

ABSTRACT:
A pitch averaging Bragg grating includes a plurality of grating peaks spaced by different pitch values. By selecting the different pitch values to have an average pitch value equal to a target pitch value, the pitch averaging Bragg grating can be made to perform like a constant pitch Bragg grating having a fixed pitch at the target pitch value. The different pitch values can be multiples of the minimum placement resolution of a production tool to be used to produce the Bragg grating. The pitch averaging Bragg grating can be used in place of constant pitch Bragg gratings in optical devices and systems, such as DFB lasers, DBR lasers, optical spectral filters, multi-wavelength laser arrays, and WDM systems.

REFERENCES:
patent: 5056099 (1991-10-01), Bradley
patent: 5325392 (1994-06-01), Tohmori et al.
patent: 5497393 (1996-03-01), Lee
patent: 6018534 (2000-01-01), Pan et al.
patent: 6608855 (2003-08-01), Hwang et al.
Rishton et al., “Tunable Distributed-Feedback Laser Gratings For Telecom Applications, Manufactured By Electron-Beam Lithography”, J. Vac. Sci. Technol. B 20(6), Nov./Dec. 2002, 2002 American Vacuum Society, pp. 2749-2752.

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