Optical gain flattening filter using VPG-based optical elements

Details Optical gain flattening filter using VPG-based optical elements Optical gain flattening filter using VPG-based optical elements

2005-05-31

2005-05-31

Tarcza, Thomas H. (Department: 3663)

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

C359S566000

Reexamination Certificate

active

06900932

ABSTRACT:
An optical gain flattening filter for attenuating the wavelength power levels of an optical beam to a threshold value. The filter has a series of volume phase gratings which each have a loss spectrum. The sum of the loss spectra for the volume phase gratings is about equal to the opposite of the gain spectrum of the optical amplifier. As the optical beam passes through the volume phase gratings, the sum of the loss spectra is added to the gain spectrum of the optical amplifier such that the optical beam is attenuated to the threshold value.

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Yu et al. Volume phase grating based flat-top passband response dense wavelength division multiplexers. OFCC 2003. Mar. 23-28, 2003. vol. 1. pp. 255-257.

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