A new way of controlling NesCOPOs (Nested Cavity doubly resonant OPO) for faster and more efficient high resolution spectrum measurement

Johann Georges des Aulnois; Benjamin Szymanski; Axel Grimieau; Léo Sillard

doi:10.1117/12.2299285

14 May 2018 A new way of controlling NesCOPOs (Nested Cavity doubly resonant OPO) for faster and more efficient high resolution spectrum measurement

Johann Georges des Aulnois, Benjamin Szymanski, Axel Grimieau, Léo Sillard

Author Affiliations +

Proceedings Volume 10684, Nonlinear Optics and its Applications 2018; 1068411 (2018) https://doi.org/10.1117/12.2299285
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

Optical Parametric Oscillator (OPO) is a well-known solution when wide tunability in the mid-infrared is needed. A specific design called NesCOPO (Nested Cavity doubly resonant OPO) is currently integrated in the X-FLR8 portable gas analyzer from Blue Industry and Science. Thanks to its low threshold this OPO can be pumped by a micro-chip nanosecond YAG (4 kHz repetition rate and a 30 GHz bandwidth). To achieve very high resolution spectra (10 pm of resolution or better), the emitted wavelength has to be finely controlled. Commercial Wavemeter do not meet price and compactness required in the context of an affordable and portable gas analyzer. To overcome this issue, Blue first integrated an active wavelength controller using multiple tunable Fabry-Perot (FP) interferometers. The required resolution was achieved at a 10 Hz measurement rate. We now present an enhanced Wavemeter architecture, based on fixed FP etalons, that is 100 times faster and 2 times smaller. We avoid having FP ‘blind zones’ thanks to one source characteristic: the knowledge of the FSR (Free Spectral Range) of the OPO source and thus, the fact that only discrete wavelengths can be emitted. First results are displayed showing faster measurement for spectroscopic application, and potential future improvement of the device are discussed.

Citation Download Citation

Johann Georges des Aulnois, Benjamin Szymanski, Axel Grimieau, and Léo Sillard "A new way of controlling NesCOPOs (Nested Cavity doubly resonant OPO) for faster and more efficient high resolution spectrum measurement", Proc. SPIE 10684, Nonlinear Optics and its Applications 2018, 1068411 (14 May 2018); https://doi.org/10.1117/12.2299285

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available