Abstract

Two intracavity laser absorption techniques for ultralow concentration detection of chemicals in solution are compared. The first consists of a laser diode in a grating extended cavity, which produces a linear calibration curve for parts in 109 (ppb) concentrations corresponding to 17  nM. By replacing the grating with a highly reflective mirror, parts in 1012 (ppt) concentration detection is achieved, which corresponds to 340   pM. We report, to our knowledge for the first time, ppt detection of analyte concentration in liquid solution demonstrating good agreement between theory and experiment.

© 2007 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Infrared intracavity laser absorption spectroscopy with a continuous-scan Fourier-transform interferometer

Jixin Cheng, Hai Lin, Shuiming Hu, Shenggui He, Qingshi Zhu, and Alexander Kachanov
Appl. Opt. 39(13) 2221-2229 (2000)

Ultrasensitive, real-time trace gas detection using a high-power, multimode diode laser and cavity ringdown spectroscopy

Andreas Karpf, Yuhao Qiao, and Gottipaty N. Rao
Appl. Opt. 55(16) 4497-4504 (2016)

Real-time detection of 13CH4 in ambient air by use of mid-infrared cavity leak-out spectroscopy

D. Kleine, H. Dahnke, W. Urban, P. Hering, and M. Mürtz
Opt. Lett. 25(21) 1606-1608 (2000)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription