Invention Grant
- Patent Title: Off quadrature biasing of mach zehnder modulator for improved OSNR performance
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Application No.: US15348018Application Date: 2016-11-10
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Publication No.: US09612457B2Publication Date: 2017-04-04
- Inventor: Radhakrishnan L. Nagarajan , Hari Shankar , Masaki Kato , Yang Fu
- Applicant: INPHI CORPORATION
- Applicant Address: US CA Santa Clara
- Assignee: INPHI CORPORATION
- Current Assignee: INPHI CORPORATION
- Current Assignee Address: US CA Santa Clara
- Agency: Ogawa P.C.
- Agent Richard T. Ogawa
- Main IPC: G02F1/01
- IPC: G02F1/01 ; G02F1/225 ; H04B10/50 ; G02F1/21 ; H01S3/067 ; H01S3/16

Abstract:
An integrated optical modulator device. The device can include a driver module coupled to an optical modulator. The optical modulator is characterized by a raised cosine transfer function. This optical modulator can be coupled to a light source and a bias control module, which is configured to apply an off-quadrature bias to the optical modulator. This bias can be accomplished by applying an inverse of the modulator transfer function to the optical modulator in order to minimize a noise variance. This compression function can result in an optimized increased top eye opening for a signal associated with the optical modulator. Furthermore, the optical modulator can be coupled to an EDFA (Erbium Doped Fiber Amplifier) that is coupled to a filter coupled an O/E (Optical-to-Electrical) receiver.
Public/Granted literature
- US20170059889A1 OFF QUADRATURE BIASING OF MACH ZEHNDER MODULATOR FOR IMPROVED OSNR PERFORMANCE Public/Granted day:2017-03-02
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