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Ultrafast laser-written dual-wavelength waveguide laser
Martin Ams1, Peter Dekker, Graham D Marshall
1Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), Department of Physics & Astronomy, Macquarie University, New South Wales, Australia. martin.ams@mq.edu.au
Optics Letters
|March 27, 2012
Summary
We developed a dual-wavelength waveguide laser using femtosecond laser direct-write fabrication. This laser offers narrow linewidths, high signal-to-noise ratio, and 5 mW output power per channel, demonstrating efficient dual-wavelength operation.
Area of Science:
- Optics and Photonics
- Laser Technology
- Materials Science
Background:
- Waveguide lasers are crucial for integrated photonics.
- Achieving dual-wavelength operation in a single waveguide device presents challenges.
- Femtosecond laser direct-write is a versatile fabrication technique for optical devices.
Purpose of the Study:
- To demonstrate a novel dual-wavelength waveguide laser.
- To investigate the performance characteristics of such a device.
- To showcase the utility of phase-modulated sampled-grating architecture.
Main Methods:
- Fabrication of a waveguide laser in Ytterbium (Yb)-doped phosphate glass using femtosecond laser direct-write.
- Implementation of a phase-modulated sampled-grating architecture.
- Characterization of laser performance including linewidth, signal-to-noise ratio, output power, and wavelength separation.
Main Results:
- The waveguide laser operated at dual wavelengths with a 10 nm separation.
- Achieved a narrow linewidth of less than 10 pm.
- Demonstrated a high signal-to-noise ratio exceeding 60 dB.
- Obtained an output power of 5 mW per channel.
Conclusions:
- The femtosecond laser direct-write technique enables the fabrication of high-performance dual-wavelength waveguide lasers.
- The phase-modulated sampled-grating architecture is effective for achieving stable dual-wavelength emission.
- This device shows potential for applications requiring compact, dual-wavelength laser sources.
