Characteristics of several NIR tuneable diode lasers for spectroscopic based gas sensing: A comparison

Weldon, V.; McInerney, David; Phelan, Richard; Lynch, M.; Donegan, John F.

doi:10.1016/j.saa.2005.10.051

Cited by 19 publications

(13 citation statements)

References 18 publications

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“…The system has a very low drift (10 MHz), due to small noise at low frequencies and a larger noise at higher frequencies leading to a broad linewidth (70 MHz-HWHM), higher than specified by the manufacturer and previous literature values [6]. When averaged, higher frequency noise will not affect accurate measurements of the center frequency.…”

Section: Setupmentioning

confidence: 93%

“…The distributed feedback diode laser (DFB) and the vertical cavity surface emitting laser (VCSEL) are two among other telecommunication lasers which possess good spectroscopic characteristics such as tunability, single-mode operation, and high side mode suppression ratio (SMSR). However, the desirable aspect of multi-species detection is restricted by the tunability of these diode lasers, to typically less than a nm for a current-tuned DFB [6]. Multiplexing of several diode lasers, either in time or in frequency, allows additional sensing wavelengths, but increases the complexity and the cost of the system.…”

Section: Introductionmentioning

confidence: 99%

“…Use of the Vernier effect with grating structures like sampled gratings, SG, superstructures gratings, SSG, and binary superimposed gratings, BSG, were first demonstrated on distributed Bragg reflectors, DBR, diode lasers and later on DFB diode lasers [7,12]. These multi-section diode lasers are somewhat more complex to control and tune, but possess the ability to be more broadly tuned, typically 30 nm [6]. A couple of different placement configurations of the two grating sections exist.…”

Section: Introductionmentioning

confidence: 99%

“…An alternative placement of the reflectors is in a fiber-coupled Yconfiguration, and is employed in the modulated grating Ybranch (MG-Y) diode laser investigated in this work. This laser was initially developed for telecom applications [13] but has already shown potential for spectroscopy [6,14]. In addition to the large tuning range other favorable spectroscopic characteristics are high SMSR (>40 dB), rapid tunability, and vibration insensitivity.…”

Section: Introductionmentioning

confidence: 99%

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Fast and sensitive time-multiplexed gas sensing of multiple lines using a miniature telecom diode laser between 1529 nm and 1565 nm

et al. 2011

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High-sensitive multi-species detection around 1550 nm using a modulated grating Y-branch, MG-Y, diode laser tunable between 1529 nm and 1565 nm is presented. The MG-Y diode laser is based on the Vernier effect of two modulated gratings, and exhibits quasi-continuous tuning over 36 nm. Multi-species detection is achieved by fast sequential scanning of single absorption lines of CH 4 , CO, C 2 H 2 , and CO 2 distributed over the tuning range of the diode laser. The laser wavelength is scanned about 10 GHz around each absorption line for 5 ms and this is followed by a discrete large jump in operating wavelength to the next line.The MG-Y diode laser has a good repeatability in output frequency between sequential scan segments (<10 MHz) enabling averaging of the scans. The setup employs digital wavelength modulation spectroscopy, dWMS, with Fourier-

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Section: Setupmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fast and sensitive time-multiplexed gas sensing of multiple lines using a miniature telecom diode laser between 1529 nm and 1565 nm

et al. 2011

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“…The emission wavelength of a DFB-LD can be tuned by modulating the operating temperature or injection current [5]. Current modulation is fast but its tuning range is restricted; temperature modulation can obtain a wider spectral region but limited by its modulation frequency in applications.…”

Section: Subsection Scanning Methodsmentioning

confidence: 99%

Wide absorption spectrum measuring methods by DFB-LDs in water vapor detection system

et al. 2013

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Two measuring methods of the wide absorption spectrum by distributed feedback laser diodes (DFB-LDs) are presented in detecting the water vapor absorption line. One is the subsection scanning method, and it takes advantage of the wide spectrum tuning range by the temperature modulation and fast spectrum tuning speed by current modulation. Specifically, this method is realized by dividing a target spectral region into several sections which correspond to the specific temperature of DFB-LD, scanning every section by current modulation for hundreds times, and averaging the data to raise the signal to noise ratio (SNR), then combining all sections to get the whole spectrum. An accuracy of 10 ppmv had been obtained in the measurement of water vapor with a 10-cm path length by this method. Another is data fitting method, based on the absorption line-shape function; the absorption line can be described by fitting with partial measured data. The fitting absorption line was fitted well with the measured data, and the square of correlation coefficient (R-square) was no less than 0.99.

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Demonstration of a widely tunable digital supermode distributed Bragg reflector laser as a versatile source for near-infrared spectroscopy

et al. 2012

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Characteristics of several NIR tuneable diode lasers for spectroscopic based gas sensing: A comparison

Cited by 19 publications

References 18 publications

Fast and sensitive time-multiplexed gas sensing of multiple lines using a miniature telecom diode laser between 1529 nm and 1565 nm

Fast and sensitive time-multiplexed gas sensing of multiple lines using a miniature telecom diode laser between 1529 nm and 1565 nm

Wide absorption spectrum measuring methods by DFB-LDs in water vapor detection system

Demonstration of a widely tunable digital supermode distributed Bragg reflector laser as a versatile source for near-infrared spectroscopy

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