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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
Published on: April 24, 2014
Tunable, narrow-linewidth output from an injection-locked high-power AlGaAs laser diode array
Optics Letters
|October 27, 2009
Summary
Injection locking achieved single-frequency tunable output from high-power aluminum gallium arsenide (AlGaAs) laser diode arrays. This method produced 1.0 W output with a narrow linewidth and wide tuning range.
Area of Science:
- Optics and Photonics
- Semiconductor Lasers
Background:
- High-power laser diode arrays often suffer from broad spectral linewidths.
- Achieving single-frequency, tunable output is crucial for various applications.
Purpose of the Study:
- To demonstrate single-frequency tunable output from a high-power AlGaAs laser diode array.
- To characterize the performance of an injection-locked laser system.
Main Methods:
- Employed an injection-locking technique using a narrow-linewidth external cavity laser as a master oscillator.
- Injected 15 mW of power into the AlGaAs laser diode array.
Main Results:
- Obtained a total output power of 1.0 W from the laser diode array.
- Achieved a spectral linewidth of less than 38 kHz.
- Demonstrated a wavelength tuning range of 13 nm.
- Produced a 0.67-degree wide single-lobed far-field beam.
Conclusions:
- Injection locking is an effective method for achieving high-power, single-frequency, tunable output from AlGaAs laser diode arrays.
- The demonstrated system offers excellent spectral purity and beam quality.
