Vision-based system for automatic stabilization of mode, beam steer, and output power of a high-power laser

1993 ◽  
Vol 57 (4) ◽  
pp. 267-276 ◽  
Author(s):  
C. V. Sellathamby ◽  
H. J. J. Seguin ◽  
D. R. Akitt
Keyword(s):  
Output Power ◽  
High Power ◽  
High Power Laser ◽  
Power Laser ◽  
Automatic Stabilization ◽  
Mode Beam

scholarly journals A Sensitive Carbon Monoxide Sensor Based on Photoacoustic Spectroscopy with a 2.3 μm Mid-Infrared High-Power Laser and Enhanced Gas Absorption

Sensors ◽  
2019 ◽  
Vol 19 (14) ◽  
pp. 3202 ◽  
Author(s):  
Shunda Qiao ◽  
Yufei Ma ◽  
Ying He ◽  
Xin Yu ◽  
Zhonghua Zhang ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Optical Absorption ◽  
Output Power ◽  
High Power ◽  
Photoacoustic Spectroscopy ◽  
Gas Absorption ◽  
Sensor System ◽  
Integration Time ◽  
High Power Laser ◽  
Power Laser

A photoacoustic spectroscopy (PAS)-based carbon monoxide (CO) gas sensor with a high-power laser and an enhanced gas absorption was demonstrated. The light source was a distributed feedback (DFB), continuous wave (CW) diode laser with a high output power of ~8 mW to give a strong excitation. The target gas received optical absorption enhanced two times by using a right-angle prism reflecting the laser beam. In order to reduce the noise from the background, wavelength modulation spectroscopy (WMS) and second-harmonic detection techniques were used. The modulation frequency and modulation depth were optimized theoretically and experimentally. Water vapor was added in the PAS sensor system to increase the vibrational–translational (V–T) relaxation rate of the CO molecule, which resulted in an ~8 times signal enhancement compared with the using of a dry CO/N2 gas mixture. The amplitude of the 2f signal had a 1.52-fold improvement compared to the one with only one time absorption. The experimental results showed that such a sensor had an excellent linear response to the optical power and gas concentration. At 1 s integration time, a minimum detection limit (MDL) for CO detection of 9.8 ppm was achieved. The long-term stability of the sensor system was evaluated with an Allan deviation analysis. When the integration time was 1100 s, the MDL improved to be 530 ppb. The detection performance of such a PAS-based CO sensor can be further improved when a laser with a higher output power and increasing optical absorption times is used.

Improvement of brightness and output power of high-power laser diodes in the visible spectral region

2003 ◽  
Vol 219 (1-6) ◽  
pp. 369-375 ◽  
Author(s):  
E Samsøe ◽  
P Malm ◽  
P.E Andersen ◽  
P.M Petersen ◽  
S Andersson-Engels
Keyword(s):  
Output Power ◽  
High Power ◽  
Spectral Region ◽  
Laser Diodes ◽  
Visible Spectral Region ◽  
High Power Laser ◽  
Power Laser

Feasibility Experiments for Underwater Shock and Bubble Generation with a High-Power Laser

1999 ◽  
Author(s):  
Theodore G. Jones ◽  
Jacob Grun ◽  
H. R. Burris ◽  
Charles Manka
Keyword(s):  
High Power ◽  
High Power Laser ◽  
Power Laser ◽  
Bubble Generation ◽  
Underwater Shock

Ultra-sensitive Absorption Diagnostics of Thin Films for High-power Laser Interference Coatings

2015 ◽  
Author(s):  
Jorge G. Rocca ◽  
Oscar E. Martinez ◽  
Carmen Menoni ◽  
Esteban Domene
Keyword(s):  
Thin Films ◽  
High Power ◽  
High Power Laser ◽  
Laser Interference ◽  
Power Laser

High Power Laser Diode Arrays for Pumping Solid State Laser and Pumping Characteristics

1996 ◽  
Vol 24 (Supplement) ◽  
pp. 85-88
Author(s):  
H. Kan ◽  
T. Kanzaki ◽  
H. Miyajima ◽  
Y. Ito ◽  
K. Matsui ◽  
...  
Keyword(s):  
Solid State ◽  
Laser Diode ◽  
High Power ◽  
Solid State Laser ◽  
High Power Laser ◽  
Power Laser ◽  
State Laser ◽  
Laser Diode Arrays ◽  
High Power Laser Diode
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