Results 191 to 200 of about 16,192 (250)
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Nonlinear Effects Analysis in DBR Lasers: Applications to DBR-SOA and New Double Bragg DBR
IEEE Journal of Selected Topics in Quantum Electronics, 2007This paper presents a theoretical and experimental study of nonlinear effects in distributed Bragg reflector (DBR)-type tunable lasers, which are responsible for asymmetric spectral or power characteristics, and for hysteresis phenomena. We propose an optimized DBR semiconductor optical amplifier design that suppresses these effects, making the control
Helene Debregeas-Sillard +6 more
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The COMBO DBR: Comb-Optimized DBR Laser for Versatile Design
2018 IEEE International Semiconductor Laser Conference (ISLC), 2018In this paper we describe a novel design of DBR laser that utilizes sampled gratings to optimize mirror loss and mirror bandwidth independently. This versatile design approach has enabled a wide variety of lasers, from compact low power consumption to high power and MOPA designs.
G.B. Morrison +10 more
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Miniature DBR with series capacitive loading
2010 10th Mediterranean Microwave Symposium, 2010AbstractA new miniature dual behavior resonator (DBR) topology with capacitors placed in series between the feed lines and the stubs is demonstrated. Design equations are derived. For a proof‐of‐concept, a first‐order prototype with a 1‐GHz working frequency and 70% size reduction is realized, measured, and compared with a classical DBR.
Issa, H. +3 more
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Wuli Xuebao/Acta Physica Sinica, 2006 应用特征矩阵法研究了非均匀渐变界面Al_(0.9)Ga_(0.1)As/AlyGa_(1-y)As/GaAs/Al_xGa_(1-x)As DBR的光学特性.建立了非均匀渐变界面AlyGa1-yAs的折射率模型，并得到了渐变界面特征矩阵的解析解，通过特征矩阵法分别计算了突变GaAs/Al_(0.9)Ga_(0.1)As DBR和渐变DBR的反射谱和反射相移，分析了非均匀渐变层对DBR光学特性的影响，对渐变DBR，需要在DBR前面再增加一定厚度的非均匀渐变相位匹配层才能使整个DBR满足中心波长相位匹配条件，
Wang Xiao-Dong
exaly +1 more source
Wavelength and mode stabilization of widely tunable SG-DBR and SSG-DBR lasers
IEEE Photonics Technology Letters, 1999A novel mode stabilization scheme for widely tunable SG-DBR and SSG-DBR lasers is demonstrated. It is shown that a minimum in active section voltage is obtained when a cavity mode and a reflection peak of each DBR mirror are aligned. Locking the laser to such a local minimum in active section voltage therefore ensures stable single-mode operation.
G. Sarlet, G. Morthier, R. Baets
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Competition Noise in DBR Tunable Lasers
Fluctuation and Noise Letters, 2003Tunable Lasers are key-components for Wavelength Division Multiplexing optical communication applications at 1.55μ m . In this paper, we report the study of low to mid frequency noise power spectral densities and correlation factors in various spectral purity configurations, using the Bragg section tunability around a mode-hopping situation.
Myara, M. +6 more
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A DBR-Based Approach for System Management
1999This work describes the Database Repository (DBR) as specified within the ESPRIT Project “Network Oriented Application Harmonization” (NOAH). The DBR provides a uniform solution to support the control, configuration, management and maintenance of industrial plants.
DEMARTINI, Claudio Giovanni +3 more
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Determination of the structure of HBr DBr
The Journal of Chemical Physics, 1997We have investigated the structure and dynamics of the weakly bound complex of the four bromine isotopomers of HBr DBr, using pulsed-jet Fourier transform microwave spectroscopy. In addition, the equilibrium geometry, intermolecular energy, and vibrational force constants for the dimer have been calculated at the MP2 level using a large basis set ...
Wei Chen +3 more
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Clinical evaluation of the DBR A-scan unit
American Intra-Ocular Implant Society Journal, 1979One 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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Microstrip DBR diplexer with DBS
2012 4th International High Speed Intelligent Communication Forum, 2012A 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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