A Widely Tunable High-power Continuous-wave Optical Parametric Oscillator (cw-opo) System For Mid-infrared Spectroscopy And Frequency Metrology

Telfah, Hamzeh

Permalink

https://hdl.handle.net/2142/111101 Copy

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
• Cich, Matthew J.
• Hurlbut, Walter
• Foote, David B.
• Liu, Jinjun
• Riyadh, S M Shah

Issue Date

2021-06-23

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-infrared (MIR) 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 a 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 the direct absorption measurements and the Doppler-free saturated 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 is 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. The TOPO system has been incorporated in the MIR cavity ring-down (CRD) system and the CRD-based two-photon spectroscopy system in our lab.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/111101

DOI

10.15278/isms.2021.WI10

Owning Collections