Results 251 to 260 of about 12,922 (291)

Hybrid Distributed Bragg Reflector Laser

CLEO/Europe Conference on Lasers and Electro-Optics, 1998
Current and future WDM (Wavelength Division Multiplexing) optical systems for access and transport networks require stable, low-chirp and potentially low cost lasers emitting at predetermined (ITU-T grid) wavelengths. In addition advanced OTDM (Optical Time Division Multiplexing) systems require sources for high quality picosecond pulses on the ...
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Waveguide Resonators with Distributed Bragg Reflectors

Optica Acta: International Journal of Optics, 1982
The transmission and reflection properties of a waveguide resonator with DBRs are described near and at the Bragg condition using the method of coupled waves. Different grating configurations characterized by their coupling coefficients, attentuation parameters, and geometric dimensions are included to investigate symmetrical and asymmetrical resonator
R. Kowarschik, A. Zimmermann
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High-power GaInAs lasers with distributed bragg reflectors

Digest of Conference on Optical Fiber Communication, 1992
Single-mode strained-layer lasers have been fabricated which use buried second-order gratings for distributed Bragg reflectors. The lasers contain a strained GaInAs quantum well in the active region and operate in an edge emitting fashion with CW powers in excess of 110 mW.
Stephen O'Brien, Ross Parke, David F. Welch, David G. Mehuys, Donald R. Scifres   +4 more
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Distributed Bragg reflector active optical filters

IEEE Journal of Quantum Electronics, 1991
The characteristics of active optical filters based on distributed Bragg reflector (DBR) laser diodes are described. The authors present a theoretical model for the small and large signal filter response which can be used to optimize the filter design and operating point.
N. Tessler, R. Nagar, G. Eisenstein, J. Salzman, U. Koren, G. Raybon, C.A. Burns   +6 more
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Solgel grating waveguides for distributed Bragg reflector lasers

Optics Letters, 1999
Solgel grating waveguides and their application to the fabrication of external-cavity distributed Bragg reflector (DBR) lasers are demonstrated. A new composition of aluminosilicate material is developed for the fabrication of single-mode waveguides and Bragg reflectors. An average loss of
M A, Fardad, H, Luo, Y, Beregovski, M, Fallahi   +3 more
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Distributed Bragg reflector lasers emitting around 2.3μm

Fourth International Conference on Photonics and Optical Engineering, 2021
We report on successful fabrication of GaSb-based type-I quantum well distributed Bragg reflector (DBR) lasers emitting around 2.3μm. Second-order Bragg gratings of chromium were patterned by electron beam lithography. For 1.5-mm-long laser diode, single mode continuous-wave operation with output power of 10mW is obtained.
Cheng-Ao Yang, Yi Zhang, Jin-Ming Shang, Yi-Hang Chen, Tian-Fang Wang, Xiang-Bin Su, Sen-Sen Li, Hai-Qiao Ni, Yu Zhang, Ying-Qiang Xu, Zhi-Chuan Niu   +10 more
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High-reflectivity ultraviolet AlGaN∕AlGaN distributed Bragg reflectors

Applied Physics Letters, 2006
We demonstrate high-reflectivity crack-free Al0.18Ga0.82N∕Al0.8Ga0.2N distributed Bragg reflectors (DBR) for the spectral region around 350nm grown by molecular-beam epitaxy on thick GaN templates. The structural quality of the DBR layers is maintained by compensating the compressive and tensile stress in each λ∕4 pair.
Mitrofanov, Oleg, Schmult, Stefan, Manfra, Michael J., Siegrist, Theo M., Weimann, Nils, Sergent, Arthur Michael, Molnar, Richard J.   +6 more
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High q-factor distributed bragg reflector resonators with reflectors of arbitrary thickness

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2007
The Bragg reflection technique improves the Q-factor of a resonator by reducing conductor and dielectric losses. This is achieved by designing a low-loss inner resonant region (usually free space) surrounded by an outer anti-resonant region made of distributed Bragg reflector layers.
Le Floch, Jean-Michel, Tobar, M.E., Cros, Dominique, Krupka, J.   +3 more
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Distributed Bragg Reflector Laser

2018
A laser consisting of a distributed-Bragg-reflector (DBR) having a strong wavelength selection mechanism in its reflectivity due to periodicity in the refractive index of the waveguide or the resonator, is called as a DBR laser. A laser consisting of a periodic structure on an active region is called a distributed feedback (DFB) laser, in which ...
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Saturable optical resonators with distributed Bragg-reflectors

Optics Communications, 1976
Abstract Saturable optical resonators with distributed Bragg reflectors are analyzed by using the mode coupling theory. Hysteresis and nonlinear characteristics are given as a function of the absorption coefficient, the length of the absorber region, and the coupling coefficient of the corrugated waveguide.
Masahiro Okuda, Masafumi Toyota, Kiyoshi Onaka   +2 more
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