| Author | Message | ||
     Jerry Jin (jcg2000) Senior Member Username: jcg2000 Post Number: 32 Registered: 1-2009 |
Can anyone kindly provide some readings about tunable laser diode,its principles, applications, etc? Jerry Jin | ||
| David W. Hopkins (dhopkins) Senior Member Username: dhopkins Post Number: 155 Registered: 10-2002 |
Hi Gustavo, Last I looked into this issue the TDL were not able to cover a wide wavelength range with the kind of signal stability we would like for a large number of NIR applications in highly scattering liquids or solids. I'd like to see the region from 1000 to 2400 nm covered, and for measurements at low analyte concentrations, I think we'd need pulse energy repeatability on the order of 1:10^6. Is that currently possible? Gases are nice, as the wide wavelength requirement is not necessary, and the need for the high reproducibility may be less, too. I'll be interested to hear what others have to say. Best regards, Dave | ||
| Gustavo Figueira de Paula (gustavo) Junior Member Username: gustavo Post Number: 10 Registered: 6-2008 |
Hello Guys, Does anyone tried to use tunable diode laser in near infrared range to probe solid samples in reflectance mode? Does it really make sense? TDL are used to probe gas and trace molecules in gas phase at sub-ppb level, thanks to extremely narrow emission lines and frequency modulation techniques. I believe that if we are able to attain a fraction of this fantastic LOD at solid and liquid state, a revolution will occur. Or I'm just dreaming? Gustavo. |