Cavity ring-down spectroscopy of the oxygen B-band with absolute frequency reference to the optical frequency comb

Abstract

Absolute positions of several oxygen B-band lines were measured with the Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectrometer. The frequency axis of spectra was linked to the optical frequency comb. Achieved uncertainties of line positions are between 0.9 and 2.9 MHz. Self-pressure shifts coefficients are also reported.

Broadband and highly sensitive comb-assisted cavity ring down spectroscopy of CO near 1.57µm with sub-MHz frequency accuracy

“…The advantage of our approach as compared to FC linked-FS-CRDS [11][12][13] is its simplicity, frequency measurements being performed "on the fly" with no stabilization of the length of the CRDS cell and no locking of the laser frequency.…”

“…Using PoundDrever-Hall-locked frequency-stabilized cavity ring down spectroscopy (FS-CRDS), Domysławska et al [11] reported position uncertainties between 0.9 and 2.9 MHz for the oxygen B-band near 14,450 cm À 1 . With the same FS-CRDS approach, Truong et al [12] measured the frequency of one CO 2 transition near 6336 cm À 1 with an uncertainty of $ 9 kHz while, very recently, Long et al reported 12 C 16 O 2 transition frequencies at the kHz-level from 1.6 to 7.8 mm [13].…”

“…The frequency measurements are performed "on the fly" with no stabilization of the length of the CRDS cell and no locking of the laser frequency to the CRDS cavity, which makes this approach simpler than FC linked-FS-CRDS [11][12][13]. With this system, we could determine line frequencies with accuracy as good as 20 kHz by averaging several spectra of 12 C 2 H 2 transitions near 1.5 mm [15].…”

Cavity-enhanced optical frequency comb spectroscopy in the mid-infrared application to trace detection of hydrogen peroxide

“…By controlling the radio frequencies f rep and f ceo , it is possible to precisely control the frequency of each comb line [24]. This property is utilized when optical frequency combs act as precise frequency rulers for measurements of the frequency of a cw laser [25][26][27][28][29][30].…”

Speed-dependent effects and Dicke narrowing in nitrogen-broadened oxygen

“…This implies a need for systematic high-resolution, high-accuracy measurements of line positions and pressure shifts [1] as well as intensities and widths [15] of the oxygen B-band lines. In a series of our earlier papers [16][17][18][19][20][21][22] the precise line-shape study of the self-broadened B-band transitions was presented. However, there is still a need for precise data for the oxygen B-band lines perturbed by foreign gases such as nitrogen and argon, other main constituents of air.…”