A novel discrete mode narrow linewidth laser diode for spectroscopic based gas sensing in the 1.5 μm region

Weldon, V.; Pineda-Vadillo, Pablo; Lynch, M.; Phelan, Richard; Donegan, John F.

doi:10.1007/s00340-012-5167-6

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…Depending on these four parameters and the laser chip temperature, mode cartography is performed for subsequent computer-based user access to a specific wavelength [10]. Unlike external cavity technology, the SG-DBR technology permits a fast wavelength switching time (<1 μs) [11]. These sources can offer several opportunities to permit multispecies gas monitoring in physics, chemistry, and biology and can also be applied to the detection of broadband absorbers.…”

Section: Introductionmentioning

confidence: 99%

Multigas detection using a sample-grating distributed Bragg reflector diode laser

et al. 2013

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A sample-grating distributed Bragg reflector (SG-DBR) laser with 18 preprogrammed channels operating at 1540-1580 nm is characterized and compared for use as a source of tunable diode laser gas absorption spectroscopy. Two gases, CO and CO2, were targeted in this study by direct absorption spectroscopy and wavelength modulation spectroscopy with second-harmonic detection. In addition, the detectability of sample optical thickness is reported. Potential extensions of this research in the future are assessed using the SG-DBR diode laser as a source for tunable diode laser gas absorption spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Multigas detection using a sample-grating distributed Bragg reflector diode laser

et al. 2013

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“…Commercial quantum well (Qwell) lasers usually exhibit optical linewidths of a few MHz. In order to reduce the optical linewidth to the kHz range, continuous e↵orts have been made by increasing the quality factor of the laser cavity, tailoring a specific grating structure, and reducing the spontaneous emission into the lasing mode [4][5][6][7]. One alternative approach is to improve the active medium of semiconductor lasers through incorporating quantum dot (Qdot) structures.…”

Section: Introductionmentioning

confidence: 99%

Contribution of off-resonant states to the phase noise of quantum dot lasers

Wang¹,

Zhuang²,

Grillot³

et al. 2016

Opt. Express

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The phase noise of quantum dot lasers is investigated theoretically by coupling the Langevin noise sources into the rate equations. The off-resonant populations in the excited state and in the carrier reservoir contribute to the phase noise of ground-state emission lasers through the phase-amplitude coupling effect. This effect arises from the optical-noise induced carrier fluctuations in the off-resonant states. In addition, the phase noise has low sensitivity to the carrier scattering rates.

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A novel discrete mode narrow linewidth laser diode for spectroscopic based gas sensing in the 1.5 μm region

Cited by 2 publications

References 16 publications

Multigas detection using a sample-grating distributed Bragg reflector diode laser

Multigas detection using a sample-grating distributed Bragg reflector diode laser

Contribution of off-resonant states to the phase noise of quantum dot lasers

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