Patent ID: 9684220
Date: 2017-06-20
CPC Classifications: G02F,H04B

Claim:
1. An apparatus comprising: an electro-optical modulator having first and second arms, to modulate light passing through the first and second arms according to an electrical data signal provided to the electro -optical modulator, to output an optical data signal that combines first and second light portions outputted by the first and second arms respectively; and a control module coupled with the electro-optical modulator, to convert the first and second light portions into first and second power signals indicative of respective phases of the first and second light portions, determine a balance between the first and second power signals, and adjust a phase of one of the first or second light portions, to achieve a bias point to provide the optical data signal, and is further to determine, at power-on, a bias current to adjust a phase of one of the first or second light portions to achieve the balance between the first and second power signals.