Talk:Tunable diode laser absorption spectroscopy

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Untitled[edit]

What is this talk about 1 MHz? As long as one works at room temperature, and not with Doppler-frsee techniques, all interactions are broadened by the Doppler effect, which is in the order of 1 GHz.

What is it I have missed?

Renxa (talk) 18:09, 11 April 2008 (UTC)[reply]

In the section "Concentration measurement" the line explaining "the absorbance of the medium":

α = σ * N = (S * Φ) * N with σ = (S * Φ)

To my understanding N is missing in the article, compare to http://en.wikipedia.org/wiki/Beer-Lambert_law

FJ --88.71.32.213 (talk) 10:08, 1 October 2010 (UTC)[reply]

Absorption limits[edit]

I was a bit surprised when I read about the limits stated here. Are those still accurate? There are several publications reaching higher absorption levels than 10^-3 for direct absorption spectroscopy, which is the level stated here. AndreasHaensel (talk) 13:09, 31 July 2017 (UTC)[reply]

That's a good question. Some manufacturers get better than that resolution in their products. SoftwareThing (talk) 00:42, 17 January 2019 (UTC)[reply]

SpectraSensors achieves higher precision than that, I see. I should add some text to this article, update this page since it's somewhat obsolete. SoftwareThing (talk) 14:16, 25 March 2021 (UTC)[reply]

Page lacking informative details[edit]

This extant page is pretty poor inasmuch as it offers a broad view of what the technology and entails, but it's lacking such things as what the accuracy of precision is for contemporary technologies developed by academic and corporate approaches. I really does need updating with modern specifics.

Can't we find some scientists to flesh-out this page, there must be a number of Universities and corporate products that use TDLAS who could contribute to bringing this article from a poor "D" quality level up to at least a "B" surely. SoftwareThing (talk) 03:07, 8 December 2020 (UTC)[reply]

I'm going to update this somewhat today, provide a real world application used on the Mars Lander created by NASA engineers and then later by Endress&Hauser for water molecule measurements. SoftwareThing (talk) 14:14, 25 March 2021 (UTC)[reply]

It's also used extensively at every refinery in the US for hazardous gas monitoring. I'm in the field, just not sure I can dedicate the time to find the research to back up what I was taught in the field. Bgmenconi (talk) 17:41, 25 May 2022 (UTC)[reply]