bullet Sensors & Transducers Journal

    (ISSN: 2306-8515, e-ISSN 1726-5479)

0.705

2013 Global Impact Factor

205.767

2008 e-Impact Factor

25 Top Downloaded Articles

Best Selling Articles 2012

Journal Subscription

Editorial Calendar

Submit an Article

Editorial Board

Current Issue

S&T journal's cover

Sensors & Transducers Journal 2011

Sensors & Transducers Journal 2010

Sensors & Transducers Journal 2009

Sensors & Transducers Journal 2008

Sensors & Transducers Journal 2007

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

2006 S&T e-Digest Contents

 

Best Articles 2011

 

 

 

Vol. 188, Issue 5, May 2015, pp. 40-47

 

Bullet

 

Photoacoustic Hydrocarbon Spectroscopy Using a Mach-Zehnder Modulated cw OPO
 

Henry Bruhns, Yannick Saalberg, Marcus Wolff

Hamburg University of Applied Sciences, Heinrich Blasius Institute for Physical Technologies, Berliner Tor 21, 20099 Hamburg, Germany
Tel.: +49 40 42875-8664, fax: +49 40 42875-8626

E-mail: henry.bruhns@haw-hamburg.de

 

Received: 2 April 2015 /Accepted: 5 May 2015 /Published: 29 May 2015

Digital Sensors and Sensor Sysstems

 

Abstract: This paper describes a new photoacoustic spectrometer for the investigation of hydrocarbons based on a continuous wave optical-parametric oscillator (OPO). Two modulation methods for the generation of the photoacoustic signal are compared. In addition to the traditional modulation by a mechanical chopper a Mach-Zehnder modulator was set up for this wavelength range and used to shape the OPO beam. Spectra of three hydrocarbon test gases (methane, ethane and propane in nitrogen) were measured between 3200 nm and 3500 nm. The differences between the two modulation methods are explained and the advantages of the newly introduced Mach-Zehnder modulator are elaborated. In particular the frequency fluctuation and complexity of both methods are set in contrast with each other. The measured methane spectrum is compared against data from the HITRAN database.

 

Keywords: Chopper, Mach-Zehnder interferometer, Optical-parametric oscillator, Hydrocarbons, Methane, Ethane, Propane, Photoacoustic spectroscopy.

 

Acrobat reader logo Click <here> or title of paper to download the full pages article in pdf format

 

 

Subscribe the full-page Sensors & Transducers journal in print (paper) or pdf formats

(shipping cost by standard mail for paper version is included)

(25 % discount for IFSA Members)

 

 

 

Alternatively we accept a money transfer to our bank account. Please contact for details: sales@sensorsportal.com

 

 

Download <here> the Library Journal Recommendation Form

 

 

Read more about Chemical Sensors

 

 

 

 

 


1999 - 2015 Copyright , International Frequency Sensor Association (IFSA) Publishing, S.L. All Rights Reserved.


Home - News - Links - Archives - Tools - Voltage-to-Frequency Converters - Standardization - Patents - Marketplace - Projects - Wish List - e-Shop - Sensor Jobs - Membership - Videos - Publishing - Site Map - Subscribe - Search

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Submit Press Release - Submit White Paper - Testimonies - Twitter - Facebook - LinkedIn