Ultra low-intensity noise, 10 W all-fiber singlefrequency tunable laser system around 1550 nm

2021 ◽  
Author(s):  
Dia Darwich ◽  
Yves-Vincent Bardin ◽  
Mathieu Goeppner ◽  
Clément Dixneuf ◽  
Germain Guiraud ◽  
...  
Keyword(s):  
Laser System ◽  
Tunable Laser ◽  
Intensity Noise ◽  
Low Intensity

Robust and rapidly tunable light source for SRS/CARS microscopy with extremely low-intensity noise

2021 ◽  
Author(s):  
Harald Giessen ◽  
Heiko Linnenbank ◽  
Tobias Steinle ◽  
Florian Mörz ◽  
Moritz Floess ◽  
...  
Keyword(s):  
Light Source ◽  
Intensity Noise ◽  
Low Intensity ◽  
Cars Microscopy

A Tunable Laser System for the Wavelength Calibration of Astronomical Spectrographs

2009 ◽  
Author(s):  
Claire E. Cramer ◽  
Steven Brown ◽  
Nelson Caldwell ◽  
Andrea K. Dupree ◽  
Sylvain G. Korzennik ◽  
...  
Keyword(s):  
Laser System ◽  
Tunable Laser ◽  
Wavelength Calibration

High-power TEM_00 tunable laser system

1979 ◽  
Vol 18 (6) ◽  
pp. 891 ◽  
Author(s):  
Rita Mahon ◽  
T. J. McIlrath ◽  
David W. Koopman
Keyword(s):  
High Power ◽  
Laser System ◽  
Tunable Laser

Cavity ring-down measurements in flames using a single-mode tunable laser system

2003 ◽  
Vol 77 (1) ◽  
pp. 101-108 ◽  
Author(s):  
A. Schocker ◽  
A. Brockhinke ◽  
K. Bultitude ◽  
P. Ewart
Keyword(s):  
Laser System ◽  
Tunable Laser ◽  
Single Mode ◽  
Cavity Ring Down

scholarly journals Ultra-low intensity noise, all fiber 365 W linearly polarized single frequency laser at 1064 nm

2020 ◽  
Vol 28 (8) ◽  
pp. 10960 ◽  
Author(s):  
Clément Dixneuf ◽  
Germain Guiraud ◽  
Yves-Vincent Bardin ◽  
Quentin Rosa ◽  
Mathieu Goeppner ◽  
...  
Keyword(s):  
Single Frequency ◽  
Intensity Noise ◽  
Low Intensity ◽  
Linearly Polarized ◽  
Frequency Laser

Tunable Laser Diode System for Noninvasive Blood Glucose Measurements

2005 ◽  
Vol 59 (12) ◽  
pp. 1480-1484 ◽  
Author(s):  
Jonathon T. Olesberg ◽  
Mark A. Arnold ◽  
Carmen Mermelstein ◽  
Johannes Schmitz ◽  
Joachim Wagner
Keyword(s):  
Laser Diode ◽  
Signal To Noise Ratio ◽  
Laser System ◽  
External Cavity ◽  
Tunable Laser ◽  
Glucose Absorption ◽  
Tunable Filter ◽  
High Signal ◽  
Tunable Laser Diode ◽  
Strained Quantum Well

Optical sensing of glucose would allow more frequent monitoring and tighter glucose control for people with diabetes. The key to a successful optical noninvasive measurement of glucose is the collection of an optical spectrum with a very high signal-to-noise ratio in a spectral region with significant glucose absorption. Unfortunately, the optical throughput of skin is low due to absorption and scattering. To overcome these difficulties, we have developed a high-brightness tunable laser system for measurements in the 2.0–2.5 μm wavelength range. The system is based on a 2.3 μm wavelength, strained quantum-well laser diode incorporating GaInAsSb wells and AlGaAsSb barrier and cladding layers. Wavelength control is provided by coupling the laser diode to an external cavity that includes an acousto-optic tunable filter. Tuning ranges of greater than 110 nm have been obtained. Because the tunable filter has no moving parts, scans can be completed very quickly, typically in less than 10 ms. We describe the performance of the present laser system and avenues for extending the tuning range beyond 400 nm.

scholarly journals Ultraviolet Fluorescence Spectra of Fingerprints

2005 ◽  
Vol 5 ◽  
pp. 355-366 ◽  
Author(s):  
Naoki Saitoh ◽  
Norimitsu Akiba
Keyword(s):  
Delay Time ◽  
Fluorescence Spectra ◽  
Laser System ◽  
Tunable Laser ◽  
Ccd Camera ◽  
Peak Position ◽  
Illumination Time ◽  
Peak Separation ◽  
Clear Peak ◽  
Cooled Ccd

We have studied inherent fluorescence spectra and imaging of fingerprints in the deep ultraviolet (UV) region with a nanosecond-pulsed Nd-YAG laser system that consists of a tunable laser, a cooled CCD camera, and a grating spectrometer. In this paper, we have studied UV fluorescence spectra of fingerprints under 266-nm illumination. Fluorescence spectra of fingerprints have two main peaks, around 330 nm (peak A) and 440 nm (peak B). At first, when a fingerprint has just been pressed, peak A is dominant. However, its intensity reduces as the total illumination time increases. On the other hand, peak B is weak at first. It appears after enough 266-nm illumination and its intensity increases as time elapses. After 3 h of illumination, peak A almost diminishes and peak B becomes dominant. By leaving the fingerprint under a fluorescent lamp in a room without laser illumination, peak A can be restored partly, while the intensity of peak B still increases.Time-resolved fluorescence spectra were also measured for these two peaks. The lifetime of each peak is 2.0 nsec (peak A) and 6.2 nsec (peak B) on average. Both peaks seem to consist of several components with different lifetimes. In the case of peak A, the 330-nm peak decays fast and a new component at 360 nm becomes dominant when the delay time exceeds 20 nsec. In the case of peak B, unlike peak A, no clear peak separation is observed, but the peak position seems to move from 440 to 460 nm when the delay time becomes larger.

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