The spatially heterodyned spectrometer: A for high resolution Raman spectroscopy?

Christopher N. Pannell; Bill G. Zhang; Murray K. Reed

doi:10.1117/12.2076462

13 March 2015 The spatially heterodyned spectrometer: A for high resolution Raman spectroscopy?

Christopher N. Pannell, Bill G. Zhang, Murray K. Reed

Proceedings Volume 9369, Photonic Instrumentation Engineering II; 936903 (2015) https://doi.org/10.1117/12.2076462
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

The spatially heterodyned spectrometer (SHS) is one of a class of interesting Static Fourier Transform Spectrometers (FSTS) which offers particular advantages when high spectral resolution is required over a relatively narrow design wavelength range, and high light throughput is needed. The technique was invented by Harlander and Roesler in 1990, and have been under development in various embodiments since; the original applications were astronomical but other application areas are continually appearing. We have investigated a field-widened SHS in terms of its fundamental spectral resolution and its sensitivity. The light grasp of the SHS is very large compared to “standard” dispersive spectrometer hoverer one must be careful to distinguish between light grasp and sensitivity; our prototype device used a 3mm liquid light guide as the input optic, operating at f/1.4, and was constructed with off-the-shelf optical components, apart from the field widening prisms which were custom made. It demonstrated a S/N ratio of unity with an input power of tens of femto-Watts in a sub-resolution spectral feature, and a spectral resolution of 2.9 wave numbers, operating between 790nm and 940nm. The exposure time was of the order of 60 seconds or greater. We conclude that this arrangement would be an excellent tool for analysis of Raman spectra.

Citation Download Citation

Christopher N. Pannell, Bill G. Zhang, and Murray K. Reed "The spatially heterodyned spectrometer: A for high resolution Raman spectroscopy?", Proc. SPIE 9369, Photonic Instrumentation Engineering II, 936903 (13 March 2015); https://doi.org/10.1117/12.2076462

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