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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
Published on: April 24, 2014
High-power distributed Bragg reflector ridge-waveguide diode laser with very small spectral linewidth
K Paschke1, S Spiessberger, C Kaspari
1Ferdinand-Braun-Institut für Höchstfrequenztechnik, 12489 Berlin, Germany. katrin.paschke@fbh-berlin.de
Optics Letters
|February 4, 2010
Summary
We developed new distributed Bragg reflector ridge-waveguide diode lasers emitting at 974 nm. These lasers achieve over 1 W single-mode output power with a narrow spectral linewidth, demonstrating high performance for laser applications.
Area of Science:
- Optoelectronics
- Semiconductor Lasers
Background:
- Distributed Bragg reflector (DBR) lasers are crucial for various optical applications.
- Achieving high output power and narrow linewidth simultaneously is a key challenge in laser diode development.
Purpose of the Study:
- To investigate the performance of DBR ridge-waveguide diode lasers with sixth-order surface gratings.
- To characterize the output power and spectral linewidth of these novel lasers.
Main Methods:
- Fabrication of DBR ridge-waveguide diode lasers with specific grating orders.
- Measurement of single-mode output power.
- Spectral linewidth characterization using a self-delayed heterodyne measurement technique.
Main Results:
- Lasers exhibited an emission wavelength around 974 nm.
- Single-mode output power exceeded 1 W for 4 mm long devices.
- A very small 3 dB spectral linewidth of 1.4 MHz was measured, composed of Lorentzian and Gaussian components.
Conclusions:
- The developed DBR ridge-waveguide diode lasers demonstrate excellent performance in terms of output power and spectral purity.
- The use of sixth-order surface gratings is effective for achieving high-quality laser emission at 974 nm.
