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Related Experiment Video

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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

High power single frequency solid state master oscillator power amplifier for gravitational wave detection.

Chandrajit Basu¹, Peter Wessels, Jörg Neumann

¹Laser Zentrum Hannover e.V., Hollerithallee 8, D-30419 Hannover, Germany. c.basu@lzh.de

|July 25, 2012

Summary

Researchers developed a high-power, single-frequency laser for gravitational wave detectors. This solid-state master oscillator power amplifier (MOPA) system achieved 177 W of linearly polarized output power.

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Area of Science:

Optics and Photonics
Laser Physics
Gravitational Wave Astronomy Instrumentation

Background:

Interferometric gravitational wave detectors (GWDs) require high-power, single-frequency, single-mode, linearly polarized laser sources at the 1 μm wavelength.
Solid-state master oscillator power amplifier (MOPA) systems are a promising technology for meeting these demanding laser requirements.

Purpose of the Study:

To develop and demonstrate a robust single-frequency, solid-state MOPA system capable of delivering high output power suitable for GWD applications.
To characterize the output power, polarization, and beam quality of the developed MOPA system.

Main Methods:

Design and construction of a multistage, single-frequency, solid-state MOPA system.
Utilizing a master oscillator to generate the initial single-frequency seed laser.
Employing multiple amplifier stages to boost the laser power while maintaining single-frequency and single-mode characteristics.
Characterization of output power, polarization state, and beam quality (TEM(00) mode content).

Main Results:

The multistage MOPA system successfully delivered 177 W of continuous wave (CW) output power at 1 μm.
The output laser was single-frequency, single-mode, and linearly polarized.
The TEM(00) mode content of the output beam was measured to be 83.5%, indicating excellent beam quality.

Conclusions:

The presented single-frequency solid-state multistage MOPA system is a viable and robust solution for generating high-power laser output required by interferometric gravitational wave detectors.
The system's performance, including high power and excellent beam quality, demonstrates its potential for advancing gravitational wave detection sensitivity.