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Tunable short-pulse beat-wave laser source operating at 1 microm.

A K Hankla¹, A B Bullock, W E White

¹Positive Light, Inc., 103 Cooper Court, Los Gatos, California 95030, USA.

|January 12, 2008

Summary

This study presents a novel chirped-pulse-amplification system generating two simultaneous picosecond laser pulses at distinct wavelengths. The system offers tunable wavelength and pulse width for advanced laser applications.

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Area of Science:

Physics
Optics
Laser Technology

Background:

Chirped-pulse amplification (CPA) is a technique for amplifying ultrashort laser pulses.
Generating multiple simultaneous pulses at different wavelengths can enable new spectroscopic and material processing applications.

Purpose of the Study:

To demonstrate a CPA system capable of producing two simultaneous picosecond pulses at distinct wavelengths.
To investigate the tunability of wavelength and pulse width in such a system.

Main Methods:

Utilized an air-spaced etalon within a regenerative amplifier in a CPA system.
Employed Nd:phosphate glass and Nd:silicate gain media for dual-wavelength generation.
Adjusted etalon spacing and rotation to control wavelength and pulse width.

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Main Results:

Successfully produced two simultaneous 2.0-picosecond pulses centered at 1052 nm and 1061 nm.
Observed a beat frequency of 2.3 THz in the generated beat wave.
Achieved a 10-nm wavelength tunability range by electronically adjusting etalon spacing.
Demonstrated variable pulse width control through etalon rotation.

Conclusions:

The developed CPA system effectively generates simultaneous dual-wavelength picosecond pulses.
The system exhibits electronic tunability for wavelength and pulse width, offering flexibility for various applications.
This technology advances the capabilities of ultrafast laser systems for scientific and industrial use.