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diode laser spectroscopy

Gas sensing based on optical fibre coupled diode laser spectroscopy : a new approach to sensor systems for safety monitoring

Gas sensing based on optical fibre coupled diode laser spectroscopy : a new approach to sensor systems for safety monitoring

... The system which we shall describe in this paper utilises tuneable diode laser spectroscopy (TDLS) and optical fibre coupled detection cells linked to a central control unit. The system has now ...

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Recovery of absolute absorption line shapes in tunable diode laser spectroscopy using external amplitude modulation with balanced detection

Recovery of absolute absorption line shapes in tunable diode laser spectroscopy using external amplitude modulation with balanced detection

... tunable diode laser spectroscopy (TDLS) has become a widely used method for gas measurement in industrial, environmental and safety ...a diode laser source to sweep the laser ...

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Experimental Study of Broadening Coefficients for the v3 Band of CO by Tunable Diode Laser Spectroscopy

Experimental Study of Broadening Coefficients for the v3 Band of CO by Tunable Diode Laser Spectroscopy

... The primary motivation for measuring CO is for emissions-monitoring and combustion control applications. CO is a key indicator of combustion completeness and a regulated pollutant, so measurements of its presence can be ...

6

Near infrared spectroscopy for fibre based gas detection

Near infrared spectroscopy for fibre based gas detection

... Fibre optic linked tuneable diode laser spectroscopy offers a remarkably flexible tool for gas sensing. The basic principles have now been well established and enable sensitive and accurate ...

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A new RAM normalized 1f-WMS technique for the measurement of gas parameters in harsh environments and a comparison with 2f/1f

A new RAM normalized 1f-WMS technique for the measurement of gas parameters in harsh environments and a comparison with 2f/1f

... when the LIA phase is preset to isolate the generated 1f-RAM components, from the phase delayed WM components. In this case, the isolated 1f-RAM component is similar to the absolute gas absorption line-shape, allowing ...

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Narrow linewidth, diode laser pumped, solid state lasers

Narrow linewidth, diode laser pumped, solid state lasers

... to laser oscillation on many incoherent, unstable filaments^ ...area diode lasers. For instance, a 600|im wide stripe GaAlAs broad area laser has been operated up to 5W CW output power^^ and an ...

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Recent Advances in the Measurement of Rare-Earth Metal Transition Probabilities Using Laser-Induced Plasmas

Recent Advances in the Measurement of Rare-Earth Metal Transition Probabilities Using Laser-Induced Plasmas

... It also needed to be verified that the measured branching fractions did not change with pressure in the chamber. Observed changes of branching fractions could result from the broadening of lines and/or the opacity of the ...

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Diode laser photoacoustic spectroscopy of CO2, H2S and O2 in a differential Helmholtz resonator for trace gas analysis in the biosciences and petrochemistry

Diode laser photoacoustic spectroscopy of CO2, H2S and O2 in a differential Helmholtz resonator for trace gas analysis in the biosciences and petrochemistry

... absorption spectroscopy [32, ...near-IR laser and a photoacoustic scheme, however, are (i) convenience and lower costs; near-IR laser sources and detectors are in general much less than one tenth of ...

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Treatment of genital lesions with diode laser vaporization

Treatment of genital lesions with diode laser vaporization

... underwent laser diode vaporization of their lesion/s according to a standardized ...The laser light was then applied using ei- ther a circular or radial contact ...Zap Laser, LLC® model ...

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Diode laser welding of stainless steel 304L

Diode laser welding of stainless steel 304L

... lasers, diode lasers are not usually considered suitable for deep penetration welding, since it is widely assumed that the inferior beam quality of diode lasers excludes this technology for fusion ...of ...

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Comparative evaluation of diode laser versus argon laser photocoagulation in patients with central serous retinopathy: A pilot, randomized controlled trial [ISRCTN84128484]

Comparative evaluation of diode laser versus argon laser photocoagulation in patients with central serous retinopathy: A pilot, randomized controlled trial [ISRCTN84128484]

... by diode laser (810 nm). Laser was performed with Volk area centralis contact lens (Keeler Ltd, Clewer Hill Road, Windsor, Berks, SL4 4AA) and the parameters used were spot size of 100 microns, ...

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The effect of temperature on high power laser diode

The effect of temperature on high power laser diode

... the laser head, linearly increase with respect to pumping currents, indicates the measurement of heat dissipated from the laser ...the laser head with fan is larger compared to the laser head ...

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Micropulse diode laser trabeculoplasty in Nigerian patients

Micropulse diode laser trabeculoplasty in Nigerian patients

... SLT has the advantages that it does not leave a noticeable scar on the trabeculum and is repeatable. However, the equipment tends to be expensive and beyond the reach of many practices, especially in Africa. Also, it is ...

5

Time resolved infrared imaging and spectroscopy for engine diagnostics

Time resolved infrared imaging and spectroscopy for engine diagnostics

... Not all IR bands are equally useful. The near infrared band (NIR, 0.7-1.4 µm) offers a performance/price ratio only slight- ly worse than the visible band but only offers access to emis- sion lines of water. The ...

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Evaluation of the Efficacy of Diode Laser as an Adjunct
to Scaling and Root Planing in the Treatment of Chronic
Periodontitis: A Clinical and Microbiological Study

Evaluation of the Efficacy of Diode Laser as an Adjunct to Scaling and Root Planing in the Treatment of Chronic Periodontitis: A Clinical and Microbiological Study

... Our study results show significant reduction in the PPD and gain in CAL from the baseline till the 10 weeks follow-up in all the three groups (Table 2). Similar to result was reported by Jepsen et al., who treated a ...

5

Titanium doped sapphire crystal excited by diode pumped solid state laser

Titanium doped sapphire crystal excited by diode pumped solid state laser

... The laser crystal emission property is the crucial factor to produce ...the laser crystal during pumping ...power diode pumped solid state (DPSS) laser was used as a pumping ...

5

Near Infrared Diode Laser THz Systems

Near Infrared Diode Laser THz Systems

... The classical realisation of a time domain system is depicted schematically in the right part of Fig. 1. Instead of two lasers with narrowband linewidths a modelocked laser is used to generate ultrashort pulses. ...

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A Comparative Evalutation Of Efficacy Of Surgical Stripping, Co2 Laser, Diode Laser And Electrocautry For The Treatment Of Gingival Hyper Pigmentations  A Clinical Study

A Comparative Evalutation Of Efficacy Of Surgical Stripping, Co2 Laser, Diode Laser And Electrocautry For The Treatment Of Gingival Hyper Pigmentations A Clinical Study

... cause tissue injury, and healing is eventful. Also the depth control is difficult and optimal duration of freezing is not known, thus prolonged freezing leading to increased destruction (Ozbayrak, 2000; Yeh, 1998; Gage ...

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Applications of laser selective spectroscopy

Applications of laser selective spectroscopy

... the diode used in the intensity stabiliser, and the beam to the detector passed through, the two detectors were not seeing the same beam profile (for example, the beam may have been slightly clipped in either ...

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The thermal management system of laser diode: A review

The thermal management system of laser diode: A review

... the laser diodes and can benefit the wade range of its application ...the laser diodes and describes its basic principle of ...the laser diodes, ...for laser diodes and compared these cooling ...

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