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Oscillating longitudinal-mode control of a microchip green laser by injection current
Optics Express
|June 18, 2009
Summary
Controlling injection currents in diode-pumped microchip green lasers enables stable single, two, or three oscillating longitudinal modes. This method achieved high output power and excellent long-term power stability for the green laser.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- Diode-pumped microchip lasers are crucial for various applications.
- Controlling longitudinal modes is essential for laser stability and performance.
- Existing methods for mode control can be complex or limited.
Purpose of the Study:
- To present a simple method for controlling the oscillating longitudinal mode of a diode-pumped microchip green laser.
- To investigate the influence of injection current and temperature on laser modes.
- To achieve stable single, two, and three longitudinal mode operations.
Main Methods:
- Utilized a diode-pumped microchip green laser.
- Varied the injection current to the laser diode (850-1050 mA).
- Monitored oscillating longitudinal modes and output power.
Main Results:
- Demonstrated stable single, two, and three longitudinal mode operation by adjusting injection current.
- Achieved a maximum output power of 105.5 mW in single longitudinal-mode operation.
- Observed long-term power stability better than 0.47% over 12 hours.
Conclusions:
- Injection current control is an effective and simple method for managing longitudinal modes in microchip green lasers.
- The demonstrated technique allows for tunable mode operation with high power and stability.
- This method offers a practical approach for optimizing laser performance in relevant applications.
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