Zobrazeno 1 - 10
of 76
pro vyhledávání: '"C. Kumar N. Patel"'
Publikováno v:
AIP Advances, Vol 6, Iss 1, Pp 015312-015312-6 (2016)
Operation of continuous wave quantum cascade lasers with a frequency-shifted feedback provided by an acousto-optic modulator is reported. Measured linewidth of 1.7 cm−1 for these devices, under CW operating conditions, was in a good agreement with
Externí odkaz:
https://doaj.org/article/88655249b4ec40ae8897b0f7bd3cee14
Progress in Rapidly-Tunable External Cavity Quantum Cascade Lasers with a Frequency-Shifted Feedback
Autor:
Arkadiy Lyakh, Rodolfo Barron-Jimenez, Ilya Dunayevskiy, Rowel Go, Eugene Tsvid, C. Kumar N. Patel
Publikováno v:
Photonics, Vol 3, Iss 2, p 19 (2016)
The recent demonstration of external cavity quantum cascade lasers with optical feedback, controlled by an acousto-optic modulator, paves the way to ruggedized infrared laser systems with the capability of tuning the emission wavelength on a microsec
Externí odkaz:
https://doaj.org/article/c2d7875bc9a94b85a11c59e951395084
Autor:
Eugene Tsvid, Ankesh Todi, Hong Shu, Rowel Go, Matthew Suttinger, Pedro Figueiredo, C. Kumar N. Patel, Arkadiy Lyakh
Publikováno v:
IEEE Photonics Technology Letters. 29:1328-1331
Experimental data for 15-stage 5.6- $\mu \text{m}$ quantum cascade lasers based on Al0.78In0.22As/In0.69Ga0.31As active region composition are presented. Pulsed slope efficiency, threshold current density, and wall-plug efficiency for a $2.1~\text {m
Publikováno v:
Technologies for Optical Countermeasures XVI.
This year marks the 25th anniversary of the first demonstration of quantum cascade lasers by Faist, et al. QCLs have proven to be unique sources of mid wave infrared (MWIR) and long wave infrared (LWIR) radiation, capable of operating in continuous w
Publikováno v:
Micro- and Nanotechnology Sensors, Systems, and Applications X.
The invention and development of all-electronically tuned quantum cascade lasers has made it possible to obtain spectral information, covering over 1 μm in the long wave infrared region, regarding absorbers in less than fraction of a millisecond. Th
Autor:
Matthew Suttinger, Arkadiy Lyakh, Pedro Figueiredo, Eugene Tsvid, C. Kumar N. Patel, Ankesh Todi, Hong Shu, Rowel Go
Publikováno v:
Micro- and Nanotechnology Sensors, Systems, and Applications IX.
5.6μm quantum cascade lasers based on Al0.78In0.22As/In0.69Ga0.31As active region composition with measured pulsed room temperature wall plug efficiency of 28.3% are reported. Injection efficiency for the upper laser level of 75% was measured by tes
Autor:
C. Kumar N. Patel
Publikováno v:
Micro- and Nanotechnology Sensors, Systems, and Applications IX.
Quantum cascade lasers (QCLs) are becoming mature infrared emitting devices that convert electrical power directly into optical power and generate laser radiation in the mid wave infrared (MWIR) and long wave infrared (LWIR) regions. These lasers ope
Autor:
C. Kumar N. Patel
Publikováno v:
SPIE Proceedings.
Infrared spectroscopy has proven to be an excellent tool for identifying and quantifying gases, liquids and solid samples. For many applications, tunable laser based systems are displacing the traditional FTIR spectrometry, which utilizes black body
Autor:
C. Kumar N. Patel
Publikováno v:
Conference on Lasers and Electro-Optics.
We report an electronically tuned QCL, which provides submicrosecond scanning across several micrometers the MWIR and LWIR spectral regions, revolutionizing infrared spectroscopy and rapid detection of IEDs/CWAs, exploring combustion/explosion dynami