Results 171 to 180 of about 5,425 (221)

Dielectric-based distributed Bragg reflector (DBR) mirrors for tunable MOEMS applications

SPIE Proceedings, 2004
High reflectivity Distributed Bragg Reflector (DBR) mirrors comprising of quarter wavelength stacks of epitaxial or dielectric layers are essential in various photonic active and passive devices. Our focus has been on optimizing plasma enhanced chemical vapor deposited (PECVD) Si 3 N 4 /SiO 2 (170nm/255nm ± 20nm) based DBR stacks for high reflectivity
Vicknesh Shanmugan, Mithilesh A. Shah, S. L. Teo, Akkipeddi Ramam   +3 more
openaire   +1 more source

Deep etched distributed Bragg reflector (DBR) InP/AlGaInP quantum dot lasers

SPIE Proceedings, 2011
By optimising an InP/AlGaInP quantum dot size distribution a broad and relatively flat topped gain spectra can be achieved. Using the segmented contact method we measure the optical gain spectra and use this to explain the range of lasing wavelengths that can obtained by varying the grating structure of deep etched DBR lasers.
S. Shutts, G. Edwards, S. N. Elliott, P. M. Smowton, A. B. Krysa   +4 more
openaire   +1 more source

Wavelength-Tunable Short-Cavity DBR Laser Array With Active Distributed Bragg Reflector

Journal of Lightwave Technology, 2006
With the aim of developing a fast wavelength-tunable laser for advanced dynamic network reconfigurations or optical burst switching, a short-cavity (SC) distributed-Bragg-reflector (DBR) laser array with an active-DBR (ADBR) structure (SC-ADBR laser) was fabricated.
Hideo Arimoto, Takeshi Kitatani, Tomonobu Tsuchiya, Kazunori Shinoda, Aki Takei, Hiroyuki Uchiyama, Masahiro Aoki, Shinji Tsuji   +7 more
openaire   +1 more source

Pure frequency modulation of a multielectrode distributed-Bragg-reflector (DBR) laser diode

IEEE Photonics Technology Letters, 1989
Intensity-modulation suppressed frequency modulation (FM) is demonstrated over a 600-MHz bandwidth by using a three-electrode distributed-Bragg-reflector (DBR) laser diode (LD). A nonuniform carrier-density distribution in the active region is realized by two separated electrodes, whose push-pull modulation yields only a 0.7% intensity fluctuation per ...
O. Ishida, H. Toba, Y. Tohmori
openaire   +1 more source

Simulation of a metal nano-strip grating distributed Bragg reflector (DBR) Laser

SPIE Proceedings, 2014
The edge-emitting distributed Bragg reflector (DBR) laser with a metal nano-strip grating is proposed. It achieves a high reflectivity with a much shorter grating length of 200μm due to the high refractive index contrast of the metal and the semiconductor.
Lanxin Deng, Qingyi Guo, Jianwei Mu
openaire   +1 more source

Narrow spectral linewidth 1.5 mu m GaInAsP/InP distributed Bragg reflector (DBR) lasers

IEEE Journal of Quantum Electronics, 1989
The spectral linewidth of distributed Bragg reflector (DBR) lasers is discussed. The narrowest linewidth of 3.2 MHz was obtained at P=1.5 mW. It was found that narrow spectral linewidths can be obtained constantly for the DBR lasers with long and low optical loss corrugation regions, and with a small coupling coefficient. These results are explained by
M. Takahashi, Y. Michitsuji, M. Yoshimura, Y. Yamazoe, H. Nishizawa, T. Sugimoto   +5 more
openaire   +1 more source

Eight-wavelength distributed-Bragg-reflector (DBR) laser array transmitter for WDM applications

SPIE Proceedings, 1995
We report on the design, growth, fabrication and characterization of monolithic wavelength division multiplexed (WDM) laser array transmitter and receiver chips produced by the Canadian Solid State Optoelectronics Consortium. The transmitter chip includes multiple, discrete wavelength, distributed Bragg reflector (DBR) laser diodes monolithically ...
Mahmoud Fallahi, K. A. McGreer, Andre Delage, A. Neophytou, Ian M. Templeton, Garth Champion, F. Chatenoud, Richard A. Barber, Weijian Wang, Jian Jun He, Emil S. Koteles   +10 more
openaire   +1 more source

Improved green thermal activated delayed fluorescence OLEDs based on thermally evaporated distributed Bragg reflector (DBR) of MgF ₂ /ZnS

Nanotechnology, 2021
Abstract Unlike the traditional fabrication of distributed Bragg reflector (DBR) structure via atomic layer deposition or spin-coating, here the 1–6 pairs of magnesium fluoride (MgF 2 )/zinc sulfide (ZnS) alternative dielectric layers were grown via thermal evaporation.
Yanqiong Zheng, Juncong Chen, Weiguang Li, Chao Wang, Junbiao Peng, Bin Wei, Xifeng Li   +6 more
openaire   +2 more sources

Simulation and properties of Erbium-Doped Distributed Bragg Reflectors (ED-DBRs) and Fiber Bragg Gratings (ED-FBGs)

Optical Fiber Technology, 2013
Abstract The structure of an active Erbium-Doped Distributed Bragg Reflector (ED-DBR) and a Fiber Bragg Grating (ED-FBG) is simulated using a rigorous transmission line model and an approximate version of the coupled-mode theory, respectively. The basic calculation steps and assumptions of the proposed simulation models are described and the key ...
Nikolaos A. Stathopoulos, Stylianos P. Savaidis, Hercules Simos, Maria Rangoussi, Paata Kervalishvili   +4 more
openaire   +1 more source

Scalable Distributed Bragg Reflectors (DBR) for Enhanced Efficiency of Semi-Transparent Non-Fullerene Acceptor Based Organic Photovoltaics

Proceedings of the nanoGe Spring Meeting 2022, 2022
The introduction of non-fullerene acceptors (NFA) has provided several recent record efficiencies in organic photovoltaic (OPV) cells, reaching now above 18%1 for single-junction devices. While these developments have provided a strong boost to the OPV field, more efforts have to be devoted to their application, such as their use in windows to lower ...
Ahmadpour, Mehrad, Kumari, Tanya, Madsen, Morten   +2 more
openaire   +2 more sources