Stimulated Raman scattering spectroscopy with quantum-enhanced balanced detection scheme

Kenichi Oguchi; Zicong Xu; Yoshitaka Taguchi; Yuki Sano; Yu Miyawaki; Kazuhiro Katoh; Yasuyuki Ozeki

doi:10.1117/12.2608735

9 March 2022 Stimulated Raman scattering spectroscopy with quantum-enhanced balanced detection scheme

Kenichi Oguchi, Zicong Xu, Yoshitaka Taguchi, Yuki Sano, Yu Miyawaki, Kazuhiro Katoh, Yasuyuki Ozeki

Proceedings Volume PC12016, Optical and Quantum Sensing and Precision Metrology II; PC120163D (2022) https://doi.org/10.1117/12.2608735
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Quantum-enhanced stimulated Raman scattering (QE-SRS) becomes a powerful method for high-sensitivity molecular vibrational spectroscopy and imaging by breaking the shot-noise-limited sensitivity of classical SRS. However, it’s still challenging to achieve quantum-enhancement with typical pulse power (<10-mW) for SRS. Although amplitude-squeezing technique was utilized in the previous QE-SRS, it limits the available optical power by its deamplification or optical loss at asymmetric beamsplitter. To circumvent this problem, we propose and demonstrate SRS spectroscopy with quantum-enhanced balanced detection (QE-BD) scheme, where squeezed vacuum (SQV) is combined with a strong local oscillator (LO) to enhance the sensitivity of SRS. We generated SQV at the central wavelength of 844-nm, using a periodically-poled stoichiometric LiTaO3 waveguide. Picosecond LO light is modulated by a spatial light modulator to achieve spatial matching with SQV , and resultant high squeezing level. At each photodiode, LO has ~10-mW optical power, and –3.1-dB squeezing level was observed. To obtain the QE-SRS spectrum of dimethyl sulfoxide-d6 (d-DMSO), we scanned the wavelength of Stokes laser by a high-speed spectral scanner composed of a grating and galvanometric scanner . The QE-SRS spectrum in the wavenumber range of 1950-2300-cm-1 was acquired with 2.1-dB signal-to-noise ratio (SNR) improvement compared with classical shot-noise-limited SRS under balanced-detection. The proposed QE-BD SRS paves the way for QE-SRS with high-power pulses, and shows a potential to exceed the SNR of state-of-the-art classical SRS system without quantum enhancement

Conference Presentation

Citation Download Citation

Kenichi Oguchi, Zicong Xu, Yoshitaka Taguchi, Yuki Sano, Yu Miyawaki, Kazuhiro Katoh, and Yasuyuki Ozeki "Stimulated Raman scattering spectroscopy with quantum-enhanced balanced detection scheme", Proc. SPIE PC12016, Optical and Quantum Sensing and Precision Metrology II, PC120163D (9 March 2022); https://doi.org/10.1117/12.2608735

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Spectroscopy

Raman scattering

Raman spectroscopy

Imaging spectroscopy

Signal to noise ratio

3D scanning

Laser scanners

Show All Keywords

Keywords/Phrases

Search In:

Publication Years