公开(公告)号：US09705603B1

公开(公告)日：2017-07-11

申请号：US14844022

申请日：2015-09-03

Applicant: EOSpace Inc.

Inventor： Gregory L. Abbas

IPC: H04B10/564 ,  H04J14/00 ,  H04B10/54 ,  H04B10/2575

CPC classification number: H04B10/564 ,  G02F1/0123 ,  H04B10/2575 ,  H04B10/50575 ,  H04B10/508 ,  H04B10/54 ,  H04J14/005

Abstract: An optical modulator has a continuous wave laser input, an RF input, a bias and dither input and an output. A photodiode connected to an output tap produces a voltage that is amplified. Noise is removed from the amplified output. A spread-spectrum dither harmonic is generated and supplied to a multiplier with the amplified and filtered feedback and is used to create a DC bias. A spread-spectrum dither is created and added to the DC bias. Spread spectrum dither and bias both are applied to the bias input of optical modulator. The bias and spread spectrum dither controller is usable with other non-optical modulators and other electronic devices.