scholarly journals Balanced-detection interferometric cavity-assisted photothermal spectroscopy employing an all-fiber-coupled probe laser configuration

2021 ◽  
Vol 29 (5) ◽  
pp. 7794
Author(s):  
Johannes P. Waclawek ◽  
Harald Moser ◽  
Bernhard Lendl
Keyword(s):  
Probe Laser ◽  
Photothermal Spectroscopy ◽  
Balanced Detection

scholarly journals Balanced-detection interferometric cavity-assisted photothermal spectroscopy

2019 ◽  
Vol 27 (9) ◽  
pp. 12183 ◽  
Author(s):  
Johannes P. Waclawek ◽  
Christian Kristament ◽  
Harald Moser ◽  
Bernhard Lendl
Keyword(s):  
Photothermal Spectroscopy ◽  
Balanced Detection

scholarly journals Dual-comb Photothermal Spectroscopy

2021 ◽  
Author(s):  
Qiang Wang ◽  
Zhen Wang ◽  
Hui Zhang ◽  
Shoulin Jiang ◽  
Yingying Wang ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Spectroscopic Method ◽  
High Sensitivity ◽  
Fast Response ◽  
Sample Volume ◽  
Small Sample ◽  
Probe Laser ◽  
Spectral Measurements ◽  
Photothermal Spectroscopy ◽  
Fine Resolution

Abstract Dual-comb spectroscopy (DCS) has revolutionized optical spectroscopy by providing broadband spectral measurements with unprecedent resolution and fast response. Photothermal spectroscopy (PTS) offers an ultrasensitive and background-free gas sensing method, which is normally performed using a single-wavelength pump laser. The merging of PTS with DCS may enable a new spectroscopic method by taking advantage of both technologies, which has never been studied yet. Here, we report dual-comb photothermal spectroscopy (DC-PTS) by passing dual combs and a probe laser through a gas-filled anti-resonant hollow-core fiber, where the generated multi-heterodyne modulation of the refractive index is sensitively detected by an in-line interferometer. As an example, we have measured photothermal spectra of acetylene over 1 THz, showing a good agreement with the spectral database. Our proposed DC-PTS provides new opportunities for broadband gas sensing with super-fine resolution and high sensitivity, as well as with a small sample volume and compact configuration.

Mid-IR Photothermal Spectroscopy with an Integrated Fiber Probe Laser

CLEO: 2014 ◽  
2014 ◽  
Author(s):  
Michelle Y. Sander ◽  
Hui Liu ◽  
Alket Mërtiri ◽  
Atcha Totachawattana ◽  
Shyamsunder Erramilli
Keyword(s):  
Probe Laser ◽  
Photothermal Spectroscopy ◽  
Fiber Probe

Microscopic FCA System for Depth-Resolved Carrier Lifetime Measurement in SiC

2018 ◽  
Vol 924 ◽  
pp. 269-272 ◽  
Author(s):  
Shinichi Mae ◽  
Takeshi Tawara ◽  
Hidekazu Tsuchida ◽  
Masashi Kato
Keyword(s):  
Carrier Lifetime ◽  
Laser Light ◽  
Probe Laser ◽  
Free Carrier Absorption ◽  
Cross Sectional ◽  
Lifetime Measurements ◽  
Control Distribution ◽  
System A ◽  
Excitation Laser ◽  
Carrier Absorption

For high voltage SiC bipolar devices, carrier lifetime is an important parameter, and for optimization of device performance, we need to control distribution of the carrier lifetime in a wafer. So far, there have been limited systems for depth-resolved carrier lifetime measurements without cross sectional cut. In this study, we adopted a free carrier absorption technique and made local overlapping of the probe laser light with excitation laser light to develop depth-resolved carrier lifetime measurements. We named the developed system a microscopic FCA system and demonstrated measurement results for samples with and without intentional carrier lifetime distribution.

Thermal relaxation of glycerol and propylene glycol studied by photothermal spectroscopy

2004 ◽  
Vol 120 (8) ◽  
pp. 3726-3731 ◽  
Author(s):  
E. H. Bentefour ◽  
C. Glorieux ◽  
M. Chirtoc ◽  
J. Thoen
Keyword(s):  
Propylene Glycol ◽  
Thermal Relaxation ◽  
Photothermal Spectroscopy

Pump-Probe Laser Photolytic Fragmentation Fluorescence Spectrometry of Isomeric Alkenes

1994 ◽  
Vol 48 (5) ◽  
pp. 616-619 ◽  
Author(s):  
Bobby J. Stanton ◽  
E. T. Monroe ◽  
E. L. Wehry
Keyword(s):  
Fluorescence Intensity ◽  
Laser Fluence ◽  
Laser Wavelength ◽  
Fluorescence Spectrometry ◽  
Probe Laser ◽  
Intermediate Species ◽  
Pump Probe ◽  
Laser Pump ◽  
Photolysis Laser ◽  
Spectral Patterns

The two-laser “pump-probe” photolytic fragmentation fluorescence spectrometry of three octenes and two nonenes is described. Probe-laser-induced C2 fluorescence (Deslandres-d'Azambuja system, C1II g→ A1II u) is detected. The relative C2 fluorescence intensity and spectral patterns exhibited by each alkene are strongly dependent on the probe-laser wavelength. The dependence of the fragment fluorescence intensity on the probe-laser fluence implies that the “probe” laser induces photofragmentation of intermediate species produced by the “photolysis” laser.

scholarly journals Raman-induced Kerr effect microscopy with balanced detection

2013 ◽  
Vol 44 (10) ◽  
pp. 1385-1392 ◽  
Author(s):  
Egle Molotokaite ◽  
Vikas Kumar ◽  
Cristian Manzoni ◽  
Dario Polli ◽  
Giulio Cerullo ◽  
...  
Keyword(s):  
Kerr Effect ◽  
Balanced Detection
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