IP Library › Granted Patent US 7,356,264
Granted Patent B2
US 7,356,264 · App. 11/016,466 · Granted Apr 8, 2008

Chirp managed laser with electronic pre-distortion

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Quick Facts
Patent No.
US 7,356,264
App. No.
11/016,466
Granted
Apr 8, 2008
Kind
B2
Abstract

A fiber optic transmitter comprising: a digital driver adapted to adjust the rise time and fall time of a digital input signal; an optical source adapted to receive the digital signal and produce a frequency modulated optical signal; and an optical spectrum reshaper adapted to convert the frequency modulated optical signal to an amplitude modulated optical signal. A method for transmitting an optical signal through a fiber comprising: receiving a digital input signal; adjusting the rise time and fall time of the digital input signal so as to produce an adjusted digital input signal; passing the adjusted digital input signal to an optical source so as to produce a frequency modulated optical signal; passing the frequency modulated optical signal through an optical spectrum reshaper so as to convert the frequency modulated optical signal to an amplitude modulated optical signal; and passing the amplitude modulated signal into the fiber.

Claims (13)

1. A fiber optic transmitter comprising:

a digital driver adapted to adjust the rise time and fall time of a digital input signal;

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

an optical spectrum reshaper adapted to convert the frequency modulated optical signal to an amplitude modulated optical signal.

2. A fiber optic system according to claim 1 wherein the driver is adapted to produce a digital signal having a faster fall time than rise time.

3. A fiber optic system according to claim 1 wherein the rise time and fall time of the digital signal are adjusted so as to obtain the desired optical eye shape at the output of a transmission fiber.

4. A fiber optic system according to claim 1 wherein the rise time and fall time of the digital signal are adjusted so as to obtain the desired bit error rate at the output of a transmission fiber.

5. A method for transmitting an optical signal through a fiber comprising:

receiving a digital input signal;

adjusting the rise time and fall time of the digital input signal so as to produce an adjusted digital input signal;

passing the adjusted digital input signal to an optical source so as to produce a frequency modulated optical signal;

passing the frequency modulated optical signal through an optical spectrum reshaper so as to convert the frequency modulated optical signal to an amplitude modulated optical signal; and

passing the amplitude modulated signal into the fiber.

Assignments (6)
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 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 3, 2008
From: AZNA LLC
To: FINISAR CORPORATION
Reel/Frame 020591/0830 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 14, 2005
From: MAHGERETFTEH, DANIEL; MATSUI, YASUHIRO; TAYEBATI, PARVIZ
To: AZNA LLC
Reel/Frame 016455/0944 →