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Updated: Jun 6, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Power scaling of a fiber master oscillator power amplifier system using a coherent polarization beam combination
Radoslaw Uberna1, Andrew Bratcher, Bruce G Tiemann
1Lockheed Martin Coherent Technologies, 135 South Taylor Avenue, Louisville, Colorado 80027, USA. radek.uberna@lmco.com
Abstract:
A new coherent polarization beam combination (CPBC) architecture was employed to combine four amplified beams and produce over 25 W of coherent output with 94% efficiency and nearly diffraction-limited beam quality. The individual beams were produced by a fiber master oscillator power amplifier system and their phases were controlled and locked using servo-controlled phase modulators. The CPBC approach relies on a coherent superposition of orthogonal polarization states and allows the combination of an arbitrary number of beams with arbitrary power ratios.
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