A WIDELY TUNABLE HIGH-POWER CONTINUOUS-WAVE OPTICAL PARAMETRIC OSCILLATOR (CW-OPO) SYSTEM FOR MID-INFRARED SPECTROSCOPY AND FREQUENCY METROLOGY

Telfah, Hamzeh

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Description

Title

A WIDELY TUNABLE HIGH-POWER CONTINUOUS-WAVE OPTICAL PARAMETRIC OSCILLATOR (CW-OPO) SYSTEM FOR MID-INFRARED SPECTROSCOPY AND FREQUENCY METROLOGY

Author(s)

Telfah, Hamzeh

Contributor(s)

Haimberger, Chris ; Heiniger, Adam ; Eismann, Ulrich ; Hurlbut, Walter ; Cich, Matthew J.; Foote, David B.; Liu, Jinjun

Issue Date

24-Jun-20

Keyword(s)

Mini-symposium: Precision Spectroscopy for Fundamental Physics

Abstract

Continuous-wave optical parametric oscillators (CW-OPOs) can offer broad tuning with high resolution and high power in the mid-IR and have many important potential applications in precision spectroscopy. The widely tunable cw-OPO system (TOPO) developed by TOPTICA Photonics is capable of covering the wavelength range of 1.45-4.0 $\mu$m (with a degenerate gap between 2.07-2.19 $\mu$m) without optics or nonlinear optical crystal exchanges. A computer-controlled automation system has been developed to achieve broad (up to 300 GHz) mode-hop-free (MHF) tuning range of the idler wavelengths and high output power ($>$1 W). Its narrow linewidth is demonstrated in direct measurements and in sub-Doppler absorption spectroscopy of atmospheric molecules. Furthermore, a much-improved frequency accuracy has been achieved by referencing the OPO to a frequency comb and creating a phase-coherent bridge between the NIR and MIR spectral ranges. Frequency noise from both the OPO cavity and the seed laser are eliminated by (i) beating the OPO signal output against the fundamental of the frequency comb and (ii) beating the seed laser against a 1064 nm comb extension.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

English

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http://hdl.handle.net/2142/107640

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