Abstract
Stable dual-wavelength operation has been achieved by combining a single volume Bragg grating with a quantum-dot-based gain medium in a compact external cavity configuration, with extreme ease of alignment. The dual-wavelength output was centered at 1179.9 and 1182.8 nm, with each mode exhibiting a spectral bandwidth similar to 0.2 nm. A maximum output power of 186 mW was achieved, with both modes displaying a sidemode suppression-ratio (SMSR) of over 34 dB. Furthermore, the SMSR remained well over 26 dB within a broad current range (350-1000 mA) and temperature range (10.5 degrees C-40 degrees C). Unlike previous dual-wavelength configurations that used quantum-well-based devices, the quantum-dot-based laser here presented displays improved stability and resilience to changes in operating temperature and current.
Original language | English |
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Pages (from-to) | 176-178 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 23 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Feb 2011 |
Keywords
- Quantum-dot lasers
- semiconductor lasers
- terahertz technology
- volume Bragg gratings
- SEMICONDUCTOR-LASERS
- GENERATION
- DIODE