Investigation of a Tuneable Mode-Locked Fiber Laser for Application to Multipoint Gas Spectroscopy

Whitenett, Gillian; Stewart, George; Yu, Hongbo; Culshaw, Brian

doi:10.1109/jlt.2004.824530

Cited by 87 publications

(51 citation statements)

References 20 publications

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“…Culshaw et al (1998) have surveyed some of the system topologies that may be used with laser-based optical gas detection systems and quantified the expected system sensitivities, which are of the order of less than 1 ppm. Stewart et al (2004) and Whitenett et al (2004) have realised some of these topologies, which included a Distributed FeedBack (DFB) wavelength modulated laser cavity ring-down approach that showed a methane detection sensitivity of 50 ppm. A laser-based detection system for the detection of NO 2 gas (which is an industrial hazard and common environmental pollutant) was developed by Kobayashi et al (1981).…”

Section: Optical Fibre Implementationsmentioning

confidence: 99%

Applications and Optoelectronic Methods of Detection of Ammonia

Chambers¹,

Lyons²,

Sun³

et al. 2011

Optoelectronics - Devices and Applications

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Section: Optical Fibre Implementationsmentioning

confidence: 99%

Applications and Optoelectronic Methods of Detection of Ammonia

Chambers¹,

Lyons²,

Sun³

et al. 2011

Optoelectronics - Devices and Applications

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“…Another light source option for LL-TLAS sensing in the near infrared (NIR) region are fiber lasers, since these can provide narrow line width emissions and are relatively low cost because these can be implemented with standard communication components [4]. These lasers can be used to detect gases such as acetylene (C 2 H 2 ), hydrogen iodide (HI), ammonia (NH 3 ), carbon monoxide (CO) and carbon dioxide (CO 2 ) [11][12][13]. Lasers that will be used in TLAS applications must be able to be continuously tuned over the spectral range where the ro-vibrational absorption lines occur.…”

Section: Introductionmentioning

confidence: 99%

“…Lasers that will be used in TLAS applications must be able to be continuously tuned over the spectral range where the ro-vibrational absorption lines occur. Hence not all optical fiber lasers can be finely tuned due to the mode hopping effect [10,[12][13][14][15], however some optical fibers with continuous tuning have previously been achieved [13][14][15]. Moreover, some authors have proposed fiber lasers for gas sensing [12,16].…”

Section: Introductionmentioning

confidence: 99%

“…Hence not all optical fiber lasers can be finely tuned due to the mode hopping effect [10,[12][13][14][15], however some optical fibers with continuous tuning have previously been achieved [13][14][15]. Moreover, some authors have proposed fiber lasers for gas sensing [12,16]. A practical limitation of LL-TLAS is the difficulty to maintain fixed the wavelength of the laser at the absorption line center over time due to different factors, such as laser temperature fluctuation and oscillation current drift [17].…”

Section: Introductionmentioning

confidence: 99%

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Gas Sensor Design Based on a Line Locked Tunable Fiber Laser and the Dual Path Correlation Spectroscopy Method

et al. 2017

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Abstract:In this work a hybrid gas sensor based on a tunable fiber laser and a correlation spectroscopy technique is presented. The laser is tuned by varying the temperature of a bulk silicon wafer of 85 µm thickness and, once the desired wavelength is reached the line, is locked by keeping fixed its temperature. According to experimental results the wafer temperature variation was in the order of 0.02 K, which induced an estimated wavelength deviation of 0.12 pm, which satisfies the high wavelength position accuracy required for gas sensing applications. Additionally, it is shown that errors due to laser intensity fluctuations can be minimized by implementing a simple dual path correlation spectroscopy stage. As a proof of the suitability of our tunable fiber laser for gas sensing applications, a C 2 H 2 sensor was implemented. By using a 10 cm gas cell at atmospheric pressure, it was possible to detect concentrations from 0 to 20% with a sensitivity of 521 ppm and sub-minute time response. Moreover, the experimental measurements and simulated results have a high level of agreement. Finally, it is important to point out that, by using doped fiber with different characteristics, other wavelength emissions can be generated.

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“…The detection of very low concentrations of CO 2 , the target of the system designed in this work, has considerable importance both for atmospheric studies and for carbon emission control, for example, for climate change monitoring. It has been reported that a tunable fiber laser at a wavelength of 1.5 μm has been used for CO 2 sensing [1] in spite of a number of known difficulties with using such a short wavelength for detection of this gas. Thus the overlap of several absorption lines from familiar environmental gases in the 1.5 μm wavelength range points to the use of absorption bands in a more distinctive region of the spectrum.…”

Section: Introductionmentioning

confidence: 99%

“All-fiber” tunable laser in the 2 μm region, designed for CO₂ detection

et al. 2012

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A stable and tunable thulium-doped "all-fiber" laser offering a narrow linewidth has been created specifically to act as a compact and simple laser source for gaseous CO 2 detection. This has been done through a careful design to match the laser output wavelengths to the CO 2 absorption lines at 1.875 and 1.997 μm, respectively. A sustainable output power of 11 mW over a tuning range of 7 nm has been obtained by using a combination of a high-reflective fiber Bragg grating with a low-reflective broadband mirror, fabricated at the end of the fiber through silver film deposition. The tuning was achieved using the relaxation-compression mechanism of the fiber Bragg grating, which formed an integral part of the laser resonant cavity. A fiber Bragg grating at 1.548 μm was utilized as a wavelength reference to monitor the tuning of the laser output over the 2 μm wavelength range with a simple and inexpensive interrogator, to avoid the use of an expensive optical spectrum analyzer and to facilitate "in-the-field" operation. This "all-fiber" laser resonator has been shown to be superior in terms of laser tuning range, output power, and linewidth compared to that created with a fiber Bragg grating pair, which was limited by the nonuniform strain transfer to both fiber Bragg gratings.

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Investigation of a Tuneable Mode-Locked Fiber Laser for Application to Multipoint Gas Spectroscopy

Cited by 87 publications

References 20 publications

Applications and Optoelectronic Methods of Detection of Ammonia

Applications and Optoelectronic Methods of Detection of Ammonia

Gas Sensor Design Based on a Line Locked Tunable Fiber Laser and the Dual Path Correlation Spectroscopy Method

“All-fiber” tunable laser in the 2 μm region, designed for CO₂ detection

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Investigation of a Tuneable Mode-Locked Fiber Laser for Application to Multipoint Gas Spectroscopy

Cited by 87 publications

References 20 publications

Applications and Optoelectronic Methods of Detection of Ammonia

Applications and Optoelectronic Methods of Detection of Ammonia

Gas Sensor Design Based on a Line Locked Tunable Fiber Laser and the Dual Path Correlation Spectroscopy Method

“All-fiber” tunable laser in the 2 μm region, designed for CO2 detection

Contact Info

Product

Resources

About

“All-fiber” tunable laser in the 2 μm region, designed for CO₂ detection