Results 201 to 210 of about 12,496 (247)

Clinical evaluation of the DBR A-scan unit

American Intra-Ocular Implant Society Journal, 1979
One hundred and eight eyes of 106 patients were evaluated preoperatively with the DBR-300 A-scan ultrasonic instrument. Intraocular lens power was then calculated using the formula supplied with the instrument, and the accuracy of the instrument was evaluated. It was found that 61.1% of the eyes were within +/- 1.00 D of the calculated refractive error
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OFDR with an SSG-DBR laser

SPIE Proceedings, 2004
Recently, frequency-domain (FD) -optical-coherence-tomography (OCT) methods have been investigated extensively as more efficient and sensitive system compared with conventional time-domain (TD) -OCT. Superstructure-grating-distributed-Bragg-reflector (SSG-DBR) lasers are particularly suited for optical-frequency-domain-reflectometry (OFDR ...
Takuji Amano, Hideaki Hiro-Oka, DongHak Choi, Hiroyuki Furukawa, Fumiyoshi Kano, Mitsuo Takeda, Motoi Nakanishi, Kimiya Shimizu, Kohji Obayashi   +8 more
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Phase dependent of DBR gratings

2013 International Symposium on Next-Generation Electronics, 2013
A novel double input DBR grating is presented in this paper. The length of the grating region and the phase difference of the inputs can determine the direction and the efficiency of the output power.th of the grating region and the phase difference of the inputs can determine the direction and the efficiency of the output power.
null Nai-Hsiang Sun, null Chia-Ming Hu, null Ping-Hung Lin, null Jung-Sheng Chiang, null Shih-Chiang Lin, null Tso-Min Chou, J. K. Butler, G. A. Evans   +7 more
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On the photoelectron spectra of HBr and DBr

Journal of Electron Spectroscopy and Related Phenomena, 1972
Abstract The photoelectron spectra of HBr and DBr with He I (58.4 nm) are discussed. The photoelectron spectrum of DBr confirms the predissociation of the A 2Σ+ electronic state. A rough estimate of the predissociation rate is calculated.
J. Delwiche, P. Natalis, J. Momigny, J.E. Collin   +3 more
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Microstrip DBR diplexer with DBS

2012 4th International High Speed Intelligent Communication Forum, 2012
A microstrip diplexer with low insertion losses and high isolation is proposed. The transmit — receive (Tx — Rx) filters based on the dual-behaviour resonator (DBR) are designed at the required frequency for the realization of a diplexer. The dual-band stub (DBS) is introduced to improve rejection in the upper stopband of the Rx filter.
C. H. Chen, N. Li, W. Wu
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Numerical design of novel DBR

SPIE Proceedings, 2005
A numerical design of a kind of novel distributed Bragg reflectors (DBRs) which is used in VCSEL with 808nm wavelength is reported. In this DBR, the short period superlattice (SPS) is used for the layers with high refractive index. First, the principle of the DBR with SPS is described, and the special features of the novel DBR are given.
Wei Su, Gang Zhong
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Search for Br∗ production in the D+DBr reaction

The Journal of Chemical Physics, 2010
Deuterium bromide (DBr) is expanded from a pulsed jet into a vacuum and a synchronized pulsed laser causes photodissociation of some of the DBr molecules to produce primarily (∼85%) ground-state bromine atoms (P23/2) and fast D atoms. The latter collide with the cold DBr molecules and react to produce molecular deuterium (D2) via two possible channels,
Jianyang, Zhang, Justin, Jankunas, Nate C-M, Bartlett, Noah T, Goldberg, Richard N, Zare   +4 more
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Darstellung der DBR-Zyklen

2020
Ziel dieses Kapitels ist die Darstellung der Weiterentwicklung des Planungsrasters aufgrund des mehrfachen Durchlaufens der Zyklen in der dritten Phase des DBR-Forschungsrahmens. Daruber hinaus werden die Gestaltungsprinzipien zum Inhalt und Aufbau des Planungsrasters aufgestellt und weiterentwickelt.
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1/f NOISE IN DBR TUNABLE LASERS

Fluctuation and Noise Letters, 2006
Tunable Lasers are key-components for Wavelength Division Multiplexing optical communication applications at 1.55μm. In this paper, we compare a rate equation model with measurements performed in order to study the Bragg section contribution in the 1/f-optical-beam noise power spectral density.
Myara, Mikhaël, Signoret, Philippe, Tourrenc, Jean-Philippe, Orsal, Bernard, Jacquet, Joel   +4 more
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DBR and DFB Fiber Lasers

2009
This excerpt gives a succinct explanation of distributed Bragg reflector and distributed feedback Fiber ...
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