Two-color time-resolved Z-scan to study the thermal changes of the refractive index in liquids

1995 ◽  
Author(s):  
Valery P. Kozich ◽  
Jimmy A. Castillo ◽  
Florencio E. Hernandez ◽  
A. Olaizola
Keyword(s):  
Refractive Index ◽  
Time Resolved ◽  
Thermal Changes

Simultaneous time-resolved measurement of the reaction rates and the refractive index of photopolymerization processes

2010 ◽  
Vol 49 (17) ◽  
pp. 3316
Author(s):  
Tomasz M. Bąk ◽  
J. Bianca Beusink ◽  
Vinod Subramaniam ◽  
Johannes S. Kanger
Keyword(s):  
Refractive Index ◽  
Reaction Rates ◽  
Time Resolved

Time-resolved imaging of laser-induced refractive index changes in transparent media

2011 ◽  
Vol 82 (3) ◽  
pp. 033703 ◽  
Author(s):  
Alexandre Mermillod-Blondin ◽  
Cyril Mauclair ◽  
Jörn Bonse ◽  
Razvan Stoian ◽  
Eric Audouard ◽  
...  
Keyword(s):  
Refractive Index ◽  
Time Resolved ◽  
Transparent Media ◽  
Index Changes ◽  
Time Resolved Imaging

Femtosecond time-resolved refractive index changes in CdSSe

1992 ◽  
Author(s):  
Eric C. Fox ◽  
Edesly J. Canto-Said ◽  
Henry M. van Driel
Keyword(s):  
Refractive Index ◽  
Time Resolved ◽  
Index Changes

Picosecond nonlinear refraction of C2H4Cl2 and C2H4Br2 at 532nm studied with Z-scan technique

2018 ◽  
Vol 27 (02) ◽  
pp. 1850015
Author(s):  
Yu-Ting Kuo ◽  
Po-Yuan Huang ◽  
Yi-Ci Li ◽  
Jaw-Luen Tang ◽  
Tai-Huei Wei
Keyword(s):  
Refractive Index ◽  
Electric Field ◽  
Nonlinear Refractive Index ◽  
Kerr Effect ◽  
Nonlinear Response ◽  
Nonlinear Refraction ◽  
Molecular Motions ◽  
Time Resolved ◽  
Picosecond Pulses

We investigated optical nonlinear refraction (NLR) of C2H4Cl2 and C2H4Br2 using the [Formula: see text]-scan technique with 532[Formula: see text]nm 17 picosecond pulses delivered at 10[Formula: see text]Hz. We found that the latter shows larger positive Kerr nonlinear refractive index than the former, [Formula: see text][Formula: see text]cm2/W versus [Formula: see text][Formula: see text]cm2/W. According to our additional study on time-resolved Raman-induced Kerr effect, this observed trend is ascribed to stronger inter-molecular motions of diffusive reorientation and polarizability distortion in C2H4Br2 than in C2H4Cl2. This study helps to understand the nonlinear response of molecular motions to electric-field in great details which have not been well-defined previously.

scholarly journals Shallow-Tapered Chirped Fiber Bragg Grating Sensors for Dual Refractive Index and Temperature Sensing

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3635
Author(s):  
Takhmina Ayupova ◽  
Madina Shaimerdenova ◽  
Daniele Tosi
Keyword(s):  
Refractive Index ◽  
Spectral Analysis ◽  
Fiber Bragg Grating ◽  
Thermal Characteristics ◽  
Temperature Sensing ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors ◽  
Thermal Changes ◽  
Chirped Fiber Bragg Grating

In this work, we present a gold-coated shallow-tapered chirped fiber Bragg grating (stCFBG) for dual refractive index (RI) and temperature sensing. The stCFBG has been fabricated on a 15-mm long chirped FBG, by tapering a 7.29-mm region with a waist of 39 μm. The spectral analysis shows two distinct regions: a pre-taper region, in which the stCFBG is RI-independent and can be used to detect thermal changes, and a post-taper region, in which the reflectivity increases significantly when the RI increments. We estimate the RI and thermal sensitivities as 382.83 dB/RIU and 9.893 pm/°C, respectively. The cross-talk values are low (−1.54 × 10−3 dB/°C and 568.1 pm/RIU), which allows an almost ideal separation between RI and thermal characteristics. The stCFBG is a compact probe, suitable for long-term and temperature-compensated biosensing and detection of chemical analytes.

Time-resolved study electronic and thermal contributions to the nonlinear refractive index of Nd3+:SBN laser crystals

2008 ◽  
Vol 128 (5-6) ◽  
pp. 1013-1015 ◽  
Author(s):  
L.R. Freitas ◽  
C. Jacinto ◽  
A. Ródenas ◽  
D. Jaque ◽  
T. Catunda
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Time Resolved ◽  
Laser Crystals
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