CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 10457 > Article
Paper
24 October 2017 Dual-wavelength external cavity laser device for fluorescence suppression in Raman spectroscopy
Xuting Zhang, Zhijian Cai, Jianhong Wu
Author Affiliations +
Proceedings Volume 10457, AOPC 2017: Laser Components, Systems, and Applications; 104570M (2017) https://doi.org/10.1117/12.2283004
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
Abstract
Raman spectroscopy has been widely used in the detection of drugs, pesticides, explosives, food additives and environmental pollutants, for its characteristics of fast measurement, easy sample preparation, and molecular structure analyzing capability. However, fluorescence disturbance brings a big trouble to these applications, with strong fluorescence background covering up the weak Raman signals. Recently shifted excitation Raman difference spectroscopy (SERDS) not only can completely remove the fluorescence background, but also can be easily integrated into portable Raman spectrometers. Usually, SERDS uses two lasers with small wavelength gap to excite the sample, then acquires two spectra, and subtracts one to the other to get the difference spectrum, where the fluorescence background will be rejected. So, one key aspects of successfully applying SERDS method is to obtain a dual-wavelength laser source. In this paper, a dual-wavelength laser device design based on the principles of external cavity diode laser (ECDL) is proposed, which is low-cost and compact. In addition, it has good mechanical stability because of no moving parts. These features make it an ideal laser source for SERDS technique. The experiment results showed that the device can emit narrow-spectral-width lasers of two wavelengths, with the gap smaller than 2 nanometers. The laser power corresponding to each wavelength can be up to 100mW.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Xuting Zhang, Zhijian Cai, and Jianhong Wu "Dual-wavelength external cavity laser device for fluorescence suppression in Raman spectroscopy", Proc. SPIE 10457, AOPC 2017: Laser Components, Systems, and Applications, 104570M (24 October 2017); https://doi.org/10.1117/12.2283004
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
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
 6 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Raman spectroscopy
Semiconductor lasers
Luminescence
Holography
Laser spectroscopy
Spectroscopes
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top