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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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High-bandwidth laser frequency stabilization to a fiber-optic delay line.

Benjamin S Sheard¹, Malcolm B Gray, David E McClelland

¹Department of Physics, Center for Gravitational Physics, Faculty of Science, The Australian National University, Canberra Australian Capital Territory 0200, Australia.

|November 7, 2006

Summary

We demonstrate a new technique for stabilizing laser frequency in interferometers with long time delays, crucial for space-based gravitational wave detectors. This method achieves a control bandwidth 50 times greater than the inverse delay time.

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Area of Science:

Physics
Optical Engineering
Astrophysics

Background:

Space-based gravitational wave detectors require highly stable laser frequencies.
Interferometers with large time delays present challenges for laser frequency stabilization.

Purpose of the Study:

To demonstrate a novel technique for laser frequency stabilization in systems with large time delays.
To achieve a control bandwidth significantly exceeding the inverse delay time.

Main Methods:

Experimental demonstration of laser frequency stabilization.
Utilizing an optical fiber delay line.
Implementing a control technique to enhance bandwidth.

Main Results:

Successful laser frequency stabilization to an optical fiber delay line.

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Achieved a control bandwidth approximately 50 times the inverse delay time.

Validated the proposed technique for high-bandwidth control.

Conclusions:

The demonstrated technique is effective for laser frequency stabilization in long-delay interferometers.
This method is highly relevant for future space-based gravitational wave observatories.
The enhanced control bandwidth surpasses previous limitations.