IP Library › Granted Patent US 7,054,538
Granted Patent B2
US 7,054,538 · App. 10/680,607 · Granted May 30, 2006

Flat dispersion frequency discriminator (FDFD)

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Quick Facts
Patent No.
US 7,054,538
App. No.
10/680,607
Granted
May 30, 2006
Kind
B2
Abstract

This invention provides a flat dispersion frequency discriminator (FDFD) capable of having a substantially flat dispersion with either a positive or negative dispersion along the spectrum region of the discriminator. This way, a FDFD may not cause substantial distortion of the intensity patter of its output to minimize the occurrence distortion due to overshooting or undershooting of the intensity pattern depending on the relative spectral alignment of the laser output relative to the filter transmission.

Claims (7)

1. A fiber optic communication system, comprising:

an optical signal source adapted to produce a frequency modulated signal; and

a filter having a logarithmic transmission versus frequency with an average slope of about 1 to about 2 dB/GHz and a slope at an operating point of less than about 0.5 dB/GHz and adapted to receive the frequency modulated signal and output a substantially amplitude modulated signal.

2. The system according to claim 1 , where the filter is a coupled multicavity (CMC) filter.

3. The system according to claim 2 , where the CMC filter is formed from alternating high and low refractive index mirrors.

4. The system according to claim 1 , where the filter is a periodic filter.

5. The system according to claim 4 , where the period is an integer multiple of 25 GHz.

Assignments (4)
PATENT RELEASE AND REASSIGNMENT Recorded Jul 5, 2022
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: II-VI INCORPORATED; MARLOW INDUSTRIES, INC.; EPIWORKS, INC.; LIGHTSMYTH TECHNOLOGIES, INC.; KAILIGHT PHOTONICS, INC.; COADNA PHOTONICS, INC.; OPTIUM CORPORATION; FINISAR CORPORATION; II-VI OPTICAL SYSTEMS, INC.; M CUBED TECHNOLOGIES, INC.; II-VI PHOTONICS (US), INC.; II-VI DELAWARE, INC.; II-VI OPTOELECTRONIC DEVICES, INC.; PHOTOP TECHNOLOGIES, INC.
Reel/Frame 060574/0001 →
SECURITY INTEREST Recorded Jul 1, 2022
From: II-VI INCORPORATED; II-VI DELAWARE, INC.; M CUBED TECHNOLOGIES, INC.; II-VI PHOTONICS (US), INC.; PHOTOP TECHNOLOGIES, INC.; COHERENT, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 060562/0254 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 1, 2020
From: FINISAR CORPORATION
To: II-VI DELAWARE, INC.
Reel/Frame 052286/0001 →
NOTICE OF GRANT OF SECURITY INTEREST IN PATENTS Recorded Sep 25, 2019
From: II-VI INCORPORATED; MARLOW INDUSTRIES, INC.; EPIWORKS, INC.; LIGHTSMYTH TECHNOLOGIES, INC.; KAILIGHT PHOTONICS, INC.; COADNA PHOTONICS, INC.; OPTIUM CORPORATION; FINISAR CORPORATION; II-VI OPTICAL SYSTEMS, INC.; M CUBED TECHNOLOGIES, INC.; II-VI PHOTONICS (US), INC.; II-VI DELAWARE, INC.; II-VI OPTOELECTRONIC DEVICES, INC.; PHOTOP TECHNOLOGIES, INC.
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 050484/0204 →