Coherent Power Combination of Two Master-Oscillator-Power Amplifier (MOPA) Semiconductor Lasers Using Optical Phase Lock Loops
Abstract
Using heterodyne Optical Phase-Locked Loops (OPLLs), two 1W high power 1550 nm master-oscillator-power-amplifier (MOPA) semiconductor lasers operating as current controlled oscillators are phase-locked to a 1 mW reference laser. The signals of the two MOPAs are then coherently combined and their mutual coherence is studied. In each OPLL, the acquisition range is increased to +/-1.1GHz with the help of an aided-acquisition circuit. Control of the phase of a single slave MOPA is demonstrated using a RF phase shifter. The differential phase error between two MOPAs locked to the common reference laser is typically 22 degrees.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 19, 2007
- Accession Number
- AD1021615
Entities
People
- Amnon Yariv
- Anthony Kewitsch
- Firooz Aflatouni
- George Rakuljic
- Hossein Hashemi
- Jeffrey Ungar
- Naresh Satyan
- Wei Liang
Organizations
- California Institute of Technology