Optical frequency locking method and device for optical data transmission

US9166695B2 · kind B2 · utility

Assignee

• ADVA Optical Networking SE · DE

Inventors

• Michael Eiselt · Tauberbischofsheim, DE
• Markus Roppelt · Karlsruhe, DE

Key dates

• Filing date: Sep 11, 2012
• Grant date: Oct 20, 2015
• Expiry date: Nov 28, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/4025
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

An optical frequency locking method tunes each of a plurality of narrow-band optical channel transmit signals (having arbitrary channel frequency spacings) to a dedicated optical channel frequency. The method includes tapping-off a portion of the optical power of the respective channel transmit signal and filtering the tapped-off channel transmit signal using at least one optical filter device. The method also includes monitoring, as an optical input signal, the optical power of the respective channel transmit signal supplied to the at least one optical filter device and, as an optical output signal, the optical power of the filtered channel transmit signal. The method further includes tuning, within a predetermined locking range for the dedicated optical channel frequency, the optical frequency of the respective channel transmit signal such that a predetermined value for the ratio of the output signal and the input signal is reached.