scholarly journals All-optical detection of acoustic pressure waves with applications in photoacoustic spectroscopy

2016 ◽  
Vol 55 (29) ◽  
pp. 8266 ◽  
Author(s):  
Philip G. Westergaard ◽  
Mikael Lassen
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Acoustic Pressure ◽  
Optical Detection ◽  
Pressure Waves ◽  
All Optical

Non-contact Measurement of the Water Content in Crude Oil with All-Optical Detection

2015 ◽  
Vol 29 (5) ◽  
pp. 2919-2922 ◽  
Author(s):  
Zhi Q. Lu ◽  
Xiao Yang ◽  
Kun Zhao ◽  
Jian X. Wei ◽  
Wu J. Jin ◽  
...  
Keyword(s):  
Crude Oil ◽  
Water Content ◽  
Optical Detection ◽  
Contact Measurement ◽  
All Optical

scholarly journals Utilizing acoustic pressure waves for sensing fluid properties

2011 ◽  
Vol 25 ◽  
pp. 775-778 ◽  
Author(s):  
H. Antlinger ◽  
S. Clara ◽  
R. Beigelbeck ◽  
S. Cerimovic ◽  
F. Keplinger ◽  
...  
Keyword(s):  
Acoustic Pressure ◽  
Pressure Waves ◽  
Fluid Properties

Trace gas detection based on photoacoustic spectroscopy in 3-D printed gas cell

2020 ◽  
Vol 28 (4) ◽  
pp. 236-242
Author(s):  
Shenlong Zha ◽  
Hongliang Ma ◽  
Changli Zha ◽  
Xueyuan Cai ◽  
Yuanyuan Li ◽  
...  
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Near Infrared ◽  
Acoustic Pressure ◽  
Resonant Cavity ◽  
Photoacoustic Signal ◽  
Trace Gas ◽  
Integration Time ◽  
Photoacoustic Cell ◽  
Normal Atmospheric Pressure ◽  
Micro Resonator

A novel photoacoustic spectroscopy gas sensor based on a micro-resonator has been developed. The photoacoustic cell was designed and fabricated using 3-D printing and the photoacoustic cell volume was compressed significantly. This design greatly reduces the time of manufacturing the micro-resonator and the weight was lighter compared to traditional cells. Furthermore, the acoustic pressure distribution in the 3-D printed photoacoustic cell was analyzed by COMSOL Multiphysics software, which indicated that the strongest acoustic pressure occurred in the middle of the resonant cavity. The performance of the sensor was evaluated by detection of CH4 at normal atmospheric pressure used a near infrared distributed feedback laser emitted at 1653 nm. The characteristic of the photoacoustic signal under different pressures was also investigated. An Allan variance shows that the 3-D printed photoacoustic spectroscopy sensor has the detection limit of 1.44 ppmv (3σ) for CH4 detection at about 200 s integration time.

scholarly journals Label-Free, All-Optical Detection, Imaging and Nanometric Tracking of Single Proteins

2014 ◽  
Vol 106 (2) ◽  
pp. 194a
Author(s):  
Jaime Ortega Arroyo ◽  
Joanna Andrecka ◽  
Yasuharu Takagi ◽  
James R. Sellers ◽  
Philipp Kukura
Keyword(s):  
Optical Detection ◽  
Label Free ◽  
All Optical

scholarly journals Multimodal photoacoustic and optical coherence tomography scanner using an all optical detection scheme for 3D morphological skin imaging

2011 ◽  
Vol 2 (8) ◽  
pp. 2202 ◽  
Author(s):  
Edward Z. Zhang ◽  
Boris Povazay ◽  
Jan Laufer ◽  
Aneesh Alex ◽  
Bernd Hofer ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Detection ◽  
Optical Coherence ◽  
Detection Scheme ◽  
Skin Imaging ◽  
All Optical
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