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High-precision channel spacing and balanced output multiwavelength laser array with fine tunability.
Applied Optics
|January 15, 2021
Summary
A novel multiwavelength laser array (MLA) demonstrates fine wavelength tunability and excellent single-mode performance. This laser array offers a wide tuning range and stable output power, crucial for advanced optical systems.
Area of Science:
- Photonics and Optical Engineering
- Laser Technology
- Integrated Optics
Background:
- Advanced optical systems require lasers with precise wavelength control.
- Existing laser technologies face limitations in tunability and spectral purity.
Purpose of the Study:
- To experimentally demonstrate a multiwavelength laser array (MLA) with fine wavelength tunability.
- To evaluate the performance metrics of the MLA, including single-longitudinal-mode operation and side-mode suppression ratio (SMSR).
Main Methods:
- Experimental demonstration of a multiwavelength laser array.
- Characterization of laser performance, including wavelength range, channel spacing, wavelength deviation, output power stability, and SMSR.
Main Results:
- The MLA exhibits excellent single-longitudinal-mode performance with SMSR reaching up to 62.1 dB.
- A wide tunable wavelength range of 25.003 nm was achieved with 63 channels at 50 GHz spacing.
- All lasers showed a wavelength deviation within ±0.02 nm, and output power remained constant (standard deviation 0.63 dBm).
- All SMSRs were consistently above 50 dB.
Conclusions:
- The demonstrated MLA offers high performance in terms of wavelength tunability, spectral purity, and power stability.
- This MLA is suitable for applications demanding precise and stable multiwavelength outputs.
- The results validate the MLA's potential for next-generation optical communication and sensing systems.
