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Tunable diode laser absorption spectroscopy

Tunable diode laser absorption spectroscopy (TDLAS) is a sensitive and variable technique for gas analysis and trace gas detection. Idealphotonics provide the whole ptodct solution for customers from different fields. Tuning of the wavelength of a narrow linewidth diode laser allows scannhg of individual absorption lines of molecular gases, such as carbon dioxide (C02), carbon monoxide (C0), ammonia (NH3) or methane (CH4). By measuring the light absorption caused by the gas sample it is possible to determine the target gas volume concentration even for very small abundance. Applications for TDLAS can be found in the fields of environmental monitoring, process monitoring or atmospheric research. The investigations within the current project deal with spectrometers that are based on DFB (distributed feedback) or VCSEL (vertical cavity surface emitting laser) laser sources in the near infrared spectral region between 760 nm and 2000 nm.


TDLAS working theory

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Product Solutions and Laser diode controller

● Output of high stable drive current(up to 32A)

● High precision temperature control±0.2℃

● Safe boot with multiple protection

● High power control


IDP DFB/DBR laser

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14 PIN Butterfly package:wavelength760~2200nm

5.6 TO Package wavelength from1280to 3270nm

wavelength:2465nm,2475nm,2485nm,2495nm,2505nm,3270nm are all available from Idealphotonics Inc.

Output power:5mW, 10mW,20mW ,30Mw


Coupler or Collimator

Wavelength:460~2000nm

Configure(For coupler):1*2,2*2,3*3.Output fiber:PM,SM,MM

Find more in laser components

Detector

We can provide you different materials including Silicon detector,InGaAs detector.Please contact our sales for further information. Email:info@idealphotonics.com


Typical Absorption Spectroscopy

O2 Absorption Spectroscopy

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Oxigen is the most important molecule on earth. Without oxigen, there would be no life possible on this planet. In combustion processes, the amount of oxigen needs to be exactly measured. In the Hitran database, many transitions can be found, and there are several strong absorption lines the 760nm regime, for example. Some of these strong line at 760nm are shown in the figure, detected with a simple oxigen absorption experiment.


Caesium Absorption Spectroscopy

Caesium is a very reactive alcali metal of the first group of the table of elements. It was first discovered by Bunsen and Kirchhoff in 1860 using spectroscopic investigations. It is characterized by one valence electron. 

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The spectra show the saturated absoption of the D1 line of Caesium at 895nm. The spectra are detected with a continuous scan with a Sacher Lasertechnik tunable diode laser system


CH4 Absorption Spectroscopy

Methane is one of the most important organic molecule on earth. However, in some 'applications' the amount of methane needs to be exactly measured. In the Hitran database, many transitions can be found, and there are several strong absorption lines the 1655nm regime, for example. Some of these strong line in the 1655nm regime are shown in the figure, detected with a simple absorptionexperiment 

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HCl Absorption Spectroscopy

Hydrogen Chloride is one of the most important acits. However, in some 'applications' the amount of hydrogen chloride needs to be exactly measured. In the Hitran database, several transitions can be found. A popular transition is within the first vibrational overtone around 1742nm.


Potassium Absorption Spectroscopy

Potassium is a very reactive alcali metal of the first group of the table of elements. It was first discovered by Humphry Davy in 1807 when potassium and sodium were individually isolated from different salts by electrolysis. It is characterized by one valence electron.

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The spectra show the saturated absoption of the D1 line of Potassium at 770nm. The spectra are detected with a continuous scan with a Sacher Lasertechnik tunable Littman/Metcalf diode laser system.

Water Vapor Spectroscopy(H2O 1392nm)

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Water is the most important molecule on earth. Without water, there would be no life possible on this planet. However, in some 'applications' the amount of water vapor needs to be exactly measured. In the Hitran database, many transitions can be found, and there are several strong absorption lines the 1390nm regime, for example. Some of these strong line at 1388nm are shown in the figure, detected with a simple water vapor absorption experiment.


Rubidium Absorption Spectroscopy

Rubidium is a very reactive alcali metal of the first group of the table of elements. It was first discovered by Bunsen and Kirchhoff in 1861 using spectroscopic investigations. Due to its typical red color of the spectral lines it was named after the Latin word 'rubidus' (darkred). It is characterized by one valence electron. The natural abundance of Rubidium isotopes is 85Rb(72.2%) and 87Rb(27.8%).

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The spectra show the saturated absoption of the D2 line of Rubidium at 795nm. The spectra are detected via one continuous scan with a Idealphotonics tunable diode laser system.