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Cavity-dumped 2.70 microm erbium laser using optomechanical shutter.

Young Ho Park¹, Dong Won Lee, Hong Jin Kong

¹Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea.

The Review of Scientific Instruments

|January 7, 2009

Summary

A cavity-dumped erbium laser achieved 154 kW peak power, significantly higher than Q-switched operation. This advancement in pulsed laser technology offers improved performance for various applications.

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Area of Science:

Laser Physics
Optoelectronics
Materials Science

Background:

Erbium-doped lasers operating at 2.70 micrometers are valuable for specific applications.
Frustrated Total Internal Reflection (FTIR) shutters offer a method for pulsed laser operation.

Purpose of the Study:

To investigate and compare the performance of a cavity-dumped 2.70 microm erbium laser with a Q-switched erbium laser, both utilizing an FTIR shutter.
To optimize the pulse energy and peak power of the cavity-dumped laser by adjusting the FTIR shutter's switching time.

Main Methods:

Utilized a dichroic coated mirror for high reflectance at 2.70 microm and high transmittance at 2.79 microm to obtain laser outputs.
Implemented a frustrated total internal reflection (FTIR) shutter for both Q-switched and cavity-dumped laser configurations.

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Optimized the cavity-dumped laser by varying the switching time of the FTIR shutter.

Main Results:

The Q-switched erbium laser achieved a maximum peak power of 33.5 kW with a pulse width of 1.3 microseconds.
The cavity-dumped erbium laser demonstrated significantly higher performance, reaching a peak power of 154 kW when the pulse width was reduced to 210 nanoseconds.

Conclusions:

Cavity-dumped operation with an FTIR shutter provides superior peak power compared to Q-switched operation for 2.70 microm erbium lasers.
Optimization of the FTIR shutter switching time is crucial for maximizing the performance of cavity-dumped pulsed lasers.