Characterization of an external cavity diode laser based ring cavity NICE-OHMS system.

Journal article

The performance of an external cavity diode laser based noise immune cavity enhanced optical heterodyne molecular spectrometer is presented. To reduce the noise on the signal a ring cavity and a circuit to remove residual amplitude modulation on the pre-cavity laser radiation was implemented. We demonstrate a sensitivity of 4 x 10(-11) cm(-1) Hz(-1/2) using a cavity with a finesse of 2600 on a Doppler-broadened transition of CH(4) at 6610.063 cm(-1).

Authors: Bell, C; Hancock, G; Peverall, R; Ritchie, G; van Helden, J

• Publication status: Published
• Publisher: Optical Society of American (OSA)
• Journal: Optics express
• Volume: 17
• Issue: 12
• Pages: 9834-9839
• Publication date: 2009-06-01
• DOI: 10.1364/oe.17.009834
• EISSN: 1094-4087
• ISSN: 1094-4087
• Language: English
• Keywords: Transducers; Equipment Design; Lasers, Semiconductor; Reproducibility of Results; Computer-Aided Design; Equipment Failure Analysis; Sensitivity and Specificity