Tunable Q-switched erbium-doped fiber laser based on digital micro-mirror array

Area of Science:

• Optics and Photonics
• Laser Technology
• Fiber Optics

Background:

• Q-switched fiber lasers are crucial for pulsed light generation.
• Tunable lasers are essential for applications requiring specific wavelengths.
• Micro-mirror array devices offer precise spatial light modulation.

Purpose of the Study:

• To propose and demonstrate a novel tunable Q-switched erbium-doped fiber laser.
• To utilize a digitally controlled micro-mirror array for laser tuning and pulsing.
• To achieve precise wavelength selectivity and controllable repetition rates.

Main Methods:

• Implementation of an erbium-doped fiber laser cavity.
• Integration of a digital micro-mirror array (DMD) for spatial filtering and modulation.
• Characterization of laser output for tunability and pulsed operation.

Main Results:

• Demonstrated wavelength tuning across the 1530 nm to 1555 nm range.
• Achieved a narrow wavelength selectivity of approximately 0.1 nm.
• Successfully operated the laser in a Q-switched mode with a repetition rate of 130 Hz.

Conclusions:

• The digitally controlled micro-mirror array is an effective method for achieving tunable and Q-switched operation in fiber lasers.
• This approach offers precise control over laser output parameters.
• The demonstrated laser system has potential applications in spectroscopy, telecommunications, and sensing.