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Proceedings Paper

A time-resolved 128x128 SPAD camera for laser Raman spectroscopy
Author(s): Yuki Maruyama; Jordana Blacksberg; Edoardo Charbon
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Paper Abstract

In this paper we present a time-gated single-photon avalanche diode (SPAD) array, the first of its kind to be integrated with a newly developed time-resolved laser Raman spectrometer. Time-resolved Raman spectra from various highly fluorescent minerals were successfully observed using our SPAD array; these spectra were obscured by an overwhelming fluorescence background when measured using a traditional continuous wave green laser. The system has photon detection efficiency (PDE) of 5 % at 5 V excess bias with on-chip microlenses. The dark count rate (DCR) of this SPAD is 1.8 kHz at 5 V excess bias. However, thanks to the nanosecond scale time-gating, noise rate per frame is effectively reduced to ~10-3 counts at 40 kHz laser repetition rate.

Paper Details

Date Published: 17 May 2012
PDF: 9 pages
Proc. SPIE 8374, Next-Generation Spectroscopic Technologies V, 83740N (17 May 2012); doi: 10.1117/12.920597
Show Author Affiliations
Yuki Maruyama, Delft Univ. of Technology (Netherlands)
Jordana Blacksberg, Jet Propulsion Lab. (United States)
Edoardo Charbon, Delft Univ. of Technology (Netherlands)

Published in SPIE Proceedings Vol. 8374:
Next-Generation Spectroscopic Technologies V
Mark A. Druy; Richard A. Crocombe, Editor(s)

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