Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Edward A. Whittaker"'
Autor:
Gary C. Bjorklund, Edward A. Whittaker
Publikováno v:
The journal of physical chemistry. A. 125(39)
Advances in optical spectroscopy rely on improved detection techniques that reduce noise to fundamental detection limits. When properly applied, frequency modulation laser spectroscopy (FM spectroscopy or FMS) approaches the quantum limit for detecti
Autor:
Edward A. Whittaker, Pedro Meledina
Publikováno v:
Advanced Photonics 2016 (IPR, NOMA, Sensors, Networks, SPPCom, SOF).
We report on the application of PCF using a 5 meter Large Mode Area at the end of a 720 km of SSMF fiber with 0.5 Tbit/s ULH DWDM network that showed no transmission impairments.
Autor:
Edward A. Whittaker, Rainer Martini
Publikováno v:
Journal of Optical and Fiber Communications Reports. 2:279-292
The advent of the quantum cascade laser (QCL) with emission wavelengths available in the infrared range from 3 µm through more than 100 µm opens up the possibility of exploiting infrared atmospheric transparency windows for free space optical commu
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 11:1193-1198
We report the first diode laser spectroscopic investigation of low pressure C2F6 discharges which are commonly used for plasma etching of silicon dioxide. A new high sensitivity technique that utilizes combined wavelength and frequency modulation tec
Autor:
V. Patel, Calista Keow Leng Ng, Y. W. Bae, W. H. Tam, B. Gallois, Edward A. Whittaker, B. Singh, H. C. Sun, S. McGuire
Publikováno v:
Applied optics. 32(6)
By applying both low-frequency wavelength modulation and high-frequency phase modulation to a laser diode, we develop a sensitive, high-bandwidth chemical diagnostic tool that is applicable to a variety of gas-phase processing environments. Specific
Autor:
Edward A. Whittaker, H. C. Sun
Publikováno v:
Applied optics. 31(24)
When used for trace-gas detection, laser absorption spectroscopy is usually limited by false absorption signals that are traceable to interferometric effects induced by windows and other pairs of optical surfaces. Here we introduce a new technique th
Autor:
Chi Man Shum, Edward A. Whittaker
Publikováno v:
Applied optics. 30(27)
We have devised two useful schemes to determine the rf phase of the modulation waveforms in harmonic FM spectroscopy, a novel technique that we reported recently for the removal of residual amplitude modulation. The first method is based on the study
Publikováno v:
SPIE Proceedings.
Low power Mid-IR laser light exhibits much lower attenuation in propagation through the New York metro area when compared to Near-IR wavelengths. Depending on the type of atmospheric extinction we record a reduction of up to 800% in the exponential B
Autor:
Rainer Martini, Edward A. Whittaker
Publikováno v:
Free-Space Laser Communications ISBN: 9780387286525
The advent of the quantum cascade laser (QCL) with emission wavelengths available in the infrared range from 3 µm through more than 100 µm opens up the possibility of exploiting infrared atmospheric transparency windows for free space optical commu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2838a0386c796999870521e863276fd1
https://doi.org/10.1007/978-0-387-28677-8_9
https://doi.org/10.1007/978-0-387-28677-8_9
Autor:
Clyde G. Bethea, Alfres Y. Cho, Harold Y. Hwang, Edward A. Whittaker, James N. Baillargeon, H. C. Liu, Robert K. Murawski, Deborah L. Sivco, Federico Capasso, Rainer Martini, Chris Glazowski, Roberto Paiella, Claire F. Gmachl
Publikováno v:
SPIE Proceedings.
In this paper we present measured modulation responses on quantum-cascade lasers (QCL) up to 10 GHz. The obtained modulation response shows a flat response over the whole frequency range, proving the broadband capabilities of these devices. Even more