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Orthogonal linear polarization tunable-beat ring laser with a superluminescent diode
1Department of Electronic Engineering, Faculty of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376, Japan.
Applied Optics
|February 9, 2008
Summary
A novel ring laser using a superluminescent diode generates a tunable optical beat signal. Researchers controlled a phase retarder to adjust the beat frequency from tens of megahertz to 100 MHz.
Area of Science:
- Optics and Photonics
- Laser Technology
- Solid-State Physics
Background:
- Ring lasers are essential for various optical applications.
- Superluminescent diodes offer unique gain properties.
- Tunable optical beat signals are crucial for high-precision measurements.
Purpose of the Study:
- To demonstrate a tunable optical beat signal generation.
- To utilize a superluminescent diode in a ring laser cavity.
- To explore beat frequency control using a phase retarder.
Main Methods:
- An orthogonal linear polarization ring laser was designed.
- A superluminescent diode served as the gain medium.
- A Babinet-Soleil compensator controlled phase retardation.
Main Results:
- A tunable optical beat signal was successfully generated.
- Beat frequencies were adjusted by controlling the variable phase retarder.
- The beat frequency was tunable from tens of MHz to 100 MHz.
Conclusions:
- The developed ring laser provides a tunable optical beat signal.
- This tunable beat signal can be controlled via phase retardation.
- The system shows potential for applications requiring adjustable optical frequencies.
