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Ultralow Noise and High-Power VECSEL for High Dynamic Range and Broadband RF/Optical Links
- Source :
- Journal of Lightwave Technology, Journal of Lightwave Technology, 2014, 32 (20), pp.3489. ⟨10.1109/JLT.2014.2326956⟩, Journal of Lightwave Technology, Institute of Electrical and Electronics Engineers (IEEE)/Optical Society of America(OSA), 2014, 32 (20), pp.3489. ⟨10.1109/JLT.2014.2326956⟩
- Publication Year :
- 2014
- Publisher :
- HAL CCSD, 2014.
-
Abstract
- We describe a compact, ultralow noise, and high-power semiconductor laser implemented in a high performances wideband externally modulated optical link. The laser is based on a vertical external cavity surface emitting laser (VECSEL) designed for high-power and low-noise operation. Thanks to a specific design of the gain chip, the half-VCSEL, based on a metamorphic Bragg mirror and a report on a copper substrate, an optical power of 110 mW is obtained at 1.55 μm in the single frequency regime. For low-noise operation, the laser cavity is designed for free-relaxation-oscillations operation, i.e., in the so-called class-A regime. The Class-A VECSEL exhibits a relative intensity noise below −170 dB/Hz over a wide frequency bandwidth, from 300 MHz to 40 GHz, except at the laser free spectral range (20.4 GHz). In the low-frequency range, the laser noise, mainly due to transfer of pump noise to laser noise, goes from −110 dB/Hz at 1 kHz down to −158 dB/Hz at 10 MHz. Two externally modulated optical links are implemented and compared in terms of the RF gain and the noise figure. The first optical link is based on the ultralow noise class-A VECSEL and the second one is based on a low noise class-B DFB laser. Thanks to the outstanding noise properties of the designed VECSEL, the VECSEL-based optical link outperforms the DFB-based one, in particular for frequencies larger than 20 GHz.
- Subjects :
- Optical amplifier
Distributed feedback laser
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]
Materials science
business.industry
Relative intensity noise
Physics::Optics
Noise figure
Laser
7. Clean energy
Vertical-external-cavity surface-emitting-laser
Atomic and Molecular Physics, and Optics
law.invention
Optics
law
Optoelectronics
Laser power scaling
business
Noise (radio)
ComputingMilieux_MISCELLANEOUS
Subjects
Details
- Language :
- English
- ISSN :
- 07338724 and 15582213
- Database :
- OpenAIRE
- Journal :
- Journal of Lightwave Technology, Journal of Lightwave Technology, 2014, 32 (20), pp.3489. ⟨10.1109/JLT.2014.2326956⟩, Journal of Lightwave Technology, Institute of Electrical and Electronics Engineers (IEEE)/Optical Society of America(OSA), 2014, 32 (20), pp.3489. ⟨10.1109/JLT.2014.2326956⟩
- Accession number :
- edsair.doi.dedup.....17699702a7cd894c61d01269e5e39d2d