NDLI: Lessons Learned while Optimizing Instrument Sensitivity for Deep Ocean Raman Spectroscopy

Content Provider	IEEE Xplore Digital Library
Author	Sherman, A. Peltzer, E.T. Kirkwood, W. Dunk, R.M. Walz, P.M. Scholfield, J. Everlove, C. Brewer, P.G.
Copyright Year	2006
Description	Author affiliation: Monterey Bay Aquarium Res. Inst., Moss Landing, CA (Sherman, A.; Peltzer, E.T.; Kirkwood, W.; Dunk, R.M.; Walz, P.M.; Scholfield, J.; Everlove, C.; Brewer, P.G.)
Abstract	Over the last several years, scientists and engineers at the Monterey Bay Aquarium Research Institute (MBARI) have successfully developed and deployed two generations of deep ocean laser Raman spectrometers. There are many advantages to this type of Spectroscopy: it is rapid, non-destructive, and can be used to analyze solids, liquids, and gases. Unfortunately, one of the disadvantages of using Raman Spectroscopy is that the return signal measured is very weak. Thus, it is difficult to detect dilute chemical compounds in solution, such as bicarbonate and carbonate ions at natural concentrations. This paper discusses the efforts we have made to increase the sensitivity of our second generation Deep Ocean Raman In Situ Spectrometer (DORISS2). In developing this second generation instrument, we incorporated new components which improved system performance. These components include a new ruggedized U-shaped spectrometer and a back-illuminated CCD camera which is much more sensitive than our original front-illuminated CCD camera. The element which has had the most impact on system sensitivity is a set of new custom-made fiber optic cables. We had built several sets of custom fiber optic cables, but despite our efforts, their performance degraded substantially over time. Recently, we developed a new oil-filled pressure-compensated fiber optic cable which performs far better in pressure testing and is much more robust. At 6000 psig, this cable shows losses of only 2-3 dB versus our previous cables where losses of 25-30 dB were common. This new fiber optic cable was field tested in May and showed markedly improved performance
Starting Page	1
Ending Page	6
File Size	6583851
Page Count	6
File Format	PDF
ISBN	1424401143
DOI	10.1109/OCEANS.2006.306938
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Instruments Oceans Raman scattering Spectroscopy Optical fiber cables Optical fibers Charge coupled devices Charge-coupled image sensors Optical fiber testing Optical losses
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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