Low‐loss GaAsp+n−n+three‐dimensional optical waveguides

1976 ◽  
Vol 28 (10) ◽  
pp. 616-619 ◽  
Author(s):  
F. J. Leonberger ◽  
J. P. Donnelly ◽  
C. O. Bozler
Keyword(s):  
Optical Waveguides ◽  
Three Dimensional ◽  
Low Loss

Low Loss High Mesa Optical Waveguides Based on InGaAsP/InP Heterostructures

2006 ◽  
Vol 6 (11) ◽  
pp. 3562-3566
Author(s):  
W. S. Choi ◽  
J. H. Jang ◽  
B.-A. Yu ◽  
Y. L. Lee ◽  
W. Zhao ◽  
...  
Keyword(s):  
Optical Waveguides ◽  
Inductively Coupled Plasma ◽  
Three Dimensional ◽  
Low Loss ◽  
Sidewall Roughness ◽  
Scattering Loss ◽  
Inductively Coupled ◽  
Atomic Force ◽  
Fabry Perot ◽  
Propagation Losses

Low loss high mesa optical waveguides were fabricated on InGaAsP/InP heterostructures by utilizing inductively-coupled-plasma reactive ion etching (ICP-RIE) and electron beam lithography technique. The fabrication process was optimized by measuring sidewall roughness of deep-etched waveguides. Atomic force microscope loaded with carbon nanotude was used to obtain three-dimensional image of the etched sidewall of waveguides. The obtained statistical information such as rms roughness and correlation length was used to theoretically calculate scattering loss of waveguides. Several waveguides with different number of sharp bends and the length were fabricated and their propagation losses were measured by modified Fabry-Perot method. The measured propagation losses were compared with theoretically calculated losses.

Low‐loss multiple quantum well GaInAs/InP optical waveguides

1989 ◽  
Vol 54 (18) ◽  
pp. 1737-1739 ◽  
Author(s):  
R. J. Deri ◽  
E. Kapon ◽  
R. Bhat ◽  
M. Seto ◽  
K. Kash
Keyword(s):  
Quantum Well ◽  
Optical Waveguides ◽  
Multiple Quantum Well ◽  
Multiple Quantum ◽  
Low Loss

scholarly journals Fully three-dimensional analysis of a photonic crystal assisted silicon on insulator waveguide bend

2018 ◽  
Vol 32 (31) ◽  
pp. 1850344 ◽  
Author(s):  
N. Eti ◽  
Z. Çetin ◽  
H. S. Sözüer
Keyword(s):  
Photonic Crystal ◽  
Numerical Study ◽  
Fdtd Method ◽  
Three Dimensional ◽  
Silicon On Insulator ◽  
Geometrical Parameters ◽  
Low Loss ◽  
Bending Loss ◽  
Difference Time ◽  
Waveguide Bend

A detailed numerical study of low-loss silicon on insulator (SOI) waveguide bend is presented using the fully three-dimensional (3D) finite-difference time-domain (FDTD) method. The geometrical parameters are optimized to minimize the bending loss over a range of frequencies. Transmission results for the conventional single bend and photonic crystal assisted SOI waveguide bend are compared. Calculations are performed for the transmission values of TE-like modes where the electric field is strongly transverse to the direction of propagation. The best obtained transmission is over 95% for TE-like modes.

scholarly journals 3D Hydrodynamic Focusing in Microscale Optofluidic Channels Formed with a Single Sacrificial Layer

Micromachines ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 349 ◽  
Author(s):  
Erik S. Hamilton ◽  
Vahid Ganjalizadeh ◽  
Joel G. Wright ◽  
Holger Schmidt ◽  
Aaron R. Hawkins
Keyword(s):  
Cross Sections ◽  
Optical Waveguides ◽  
Sacrificial Layer ◽  
Three Dimensional ◽  
Single Layer ◽  
Detection Sensitivity ◽  
Low Flow ◽  
Hydrodynamic Focusing ◽  
Induced Focusing ◽  
Pressure Driven Flow

Optofluidic devices are capable of detecting single molecules, but greater sensitivity and specificity is desired through hydrodynamic focusing (HDF). Three-dimensional (3D) hydrodynamic focusing was implemented in 10-μm scale microchannel cross-sections made with a single sacrificial layer. HDF is achieved using buffer fluid to sheath the sample fluid, requiring four fluid ports to operate by pressure driven flow. A low-pressure chamber, or pit, formed by etching into a substrate, enables volumetric flow ratio-induced focusing at a low flow velocity. The single layer design simplifies surface micromachining and improves device yield by 1.56 times over previous work. The focusing design was integrated with optical waveguides and used in order to analyze fluorescent signals from beads in fluid flow. The implementation of the focusing scheme was found to narrow the distribution of bead velocity and fluorescent signal, giving rise to 33% more consistent signal. Reservoir effects were observed at low operational vacuum pressures and a balance between optofluidic signal variance and intensity was achieved. The implementation of the design in optofluidic sensors will enable higher detection sensitivity and sample specificity.

scholarly journals Mid-infrared waveguiding in three-dimensional microstructured optical waveguides fabricated by femtosecond-laser writing and phosphoric acid etching

2020 ◽  
Vol 8 (3) ◽  
pp. 257 ◽  
Author(s):  
Jinman Lv ◽  
Binbin Hong ◽  
Yang Tan ◽  
Feng Chen ◽  
Javier Rodríguez Vázquez de Aldana ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Phosphoric Acid ◽  
Optical Waveguides ◽  
Three Dimensional ◽  
Acid Etching ◽  
Laser Writing ◽  
Mid Infrared ◽  
Phosphoric Acid Etching

Low loss Si_3N_4–SiO_2 optical waveguides on Si

1987 ◽  
Vol 26 (13) ◽  
pp. 2621 ◽  
Author(s):  
C. H. Henry ◽  
R. F. Kazarinov ◽  
H. J. Lee ◽  
K. J. Orlowsky ◽  
L. E. Katz
Keyword(s):  
Optical Waveguides ◽  
Low Loss
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