Phase modulation system for dual wavelength difference spectroscopy of hemoglobin deoxygenation in tissues

1990 ◽  
Author(s):  
Britton Chance ◽  
Michael B. Maris ◽  
J. Sorge ◽  
M. Z. Zhang
Keyword(s):  
Phase Modulation ◽  
Dual Wavelength ◽  
Difference Spectroscopy

Dual-wavelength wide area illumination Raman difference spectroscopy for remote detection of chemicals

2021 ◽  
Vol 60 (12) ◽  
pp. 3540
Author(s):  
Jianfeng Ye ◽  
Ziyang Tian ◽  
Yuxin Hu ◽  
Haoyun Wei ◽  
Yan Li ◽  
...  
Keyword(s):  
Dual Wavelength ◽  
Remote Detection ◽  
Wide Area ◽  
Difference Spectroscopy

Dual-wavelength Rapid Excitation Raman Difference Spectroscopy System for Direct Detection of Ethanol in Illegal Beverages

2021 ◽  
Vol 49 (8) ◽  
pp. e21151-e21159
Author(s):  
Jian-Feng YE ◽  
Hao-Yun WEI ◽  
Xiao-Hua QI ◽  
Yan LI ◽  
Sheng WANG ◽  
...  
Keyword(s):  
Direct Detection ◽  
Dual Wavelength ◽  
Difference Spectroscopy ◽  
Spectroscopy System

Tunable microwave photonic notch filter using a dual-wavelength fiber laser with phase modulation

2006 ◽  
Vol 266 (1) ◽  
pp. 240-248 ◽  
Author(s):  
D. Liu ◽  
N.Q. Ngo ◽  
G. Ning ◽  
P. Shum ◽  
S.C. Tjin
Keyword(s):  
Fiber Laser ◽  
Phase Modulation ◽  
Notch Filter ◽  
Dual Wavelength ◽  
Microwave Photonic ◽  
Tunable Microwave

Two Synchronized Operating Modes of Femtosecond and Picosecond Pulses in a Dual-Wavelength Laser

2010 ◽  
Vol 663-665 ◽  
pp. 284-287
Author(s):  
Chang Jun Zhu ◽  
Jun Fang He ◽  
Xue Jun Zhai ◽  
Bing Xue ◽  
Chong Hui Zhang
Keyword(s):  
Phase Modulation ◽  
Laser Pulses ◽  
Mode Locking ◽  
Pulse Mode ◽  
Timing Jitter ◽  
Dual Wavelength ◽  
Pulse Envelope ◽  
Picosecond Pulses ◽  
Dual Wavelength Laser ◽  
Operating Modes

Two synchronized operating modes of femtosecond and picosecond pulses, cross mode-locking and multi-pulse operating, are presented in a two-beam-pumped dual-wavelength Ti:sapphire laser. For the cross mode-locking mode, synchronized laser pulses of 37.5 fs and 0.891ps, with a timing jitter of 139 fs, are obtained in the femtosecond cavity and picosecond cavity, respectively. For the multi-pulse mode, pulses of 35 fs are obtained in the femtosecond cavity, whereas, multi-pulse mode appears in the picosecond cavity, with a pulse envelope width of 1.06 ps. The two operating modes can be switched from one to the other, dominated mainly by the mutual interaction between cross-phase modulation and self-amplitude modulation.

Red emitting monolithic dual wavelength DBR diode lasers for shifted excitation Raman difference spectroscopy

2014 ◽  
Author(s):  
B. Sumpf ◽  
M. Maiwald ◽  
A. Müller ◽  
F. Bugge ◽  
J. Fricke ◽  
...  
Keyword(s):  
Diode Lasers ◽  
Dual Wavelength ◽  
Difference Spectroscopy
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