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Near-infrared tunable lasers with polymer waveguide Bragg gratings
Nam-Seon Son1, Kyung-Jo Kim, Jun-Whee Kim
1School of Electrical Engineering, Pusan National University, Pusan (Busan), South Korea.
Optics Express
|January 26, 2012
Summary
Wavelength tunable lasers are demonstrated using polymer waveguide Bragg reflectors with efficient thermo-optic tuning. This technology enables wide-range wavelength adjustment for near-infrared applications.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Thermo-optic (TO) tuning offers efficient refractive index modulation for optical devices.
- Polymer waveguides provide a versatile platform for integrated photonics.
- Bragg reflectors are crucial for wavelength selection in laser systems.
Purpose of the Study:
- To demonstrate wavelength tunable lasers operating in the near-infrared (NIR) spectrum.
- To leverage the superior thermo-optic efficiency of polymer waveguides for wide-range wavelength tuning.
- To incorporate a third-order Bragg reflector for simplified grating fabrication.
Main Methods:
- Utilized thermo-optic (TO) refractive index tuning of polymer waveguide Bragg reflectors.
- Optimized waveguide design for NIR wavelengths.
- Incorporated a third-order Bragg reflector for grating fabrication.
Main Results:
- Achieved wavelength tunable lasers with an output power of 0 dBm.
- Demonstrated a side-mode suppression ratio of 40 dB.
- Obtained a wide tuning range of 21 nm for the Bragg reflection wavelength.
Conclusions:
- Polymer waveguide Bragg reflectors enable efficient thermo-optic tuning for wavelength tunable lasers.
- The demonstrated device is suitable for NIR applications requiring wide wavelength tunability.
- The use of a third-order Bragg reflector facilitates practical device fabrication.
