scholarly journals High-Precision Propagation-Loss Measurement of Single-Mode Optical Waveguides on Lithium Niobate on Insulator

Micromachines ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 612 ◽  
Author(s):  
Jintian Lin ◽  
Junxia Zhou ◽  
Rongbo Wu ◽  
Min Wang ◽  
Zhiwei Fang ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
High Precision ◽  
Optical Waveguides ◽  
Single Mode ◽  
Propagation Loss ◽  
Field Size ◽  
High Precision Measurement ◽  
Mode Field ◽  
Optical Patterning ◽  
Measurement Approach

We demonstrate the fabrication of single-mode optical waveguides on lithium niobate on an insulator (LNOI) by optical patterning combined with chemomechanical polishing. The fabricated LNOI waveguides had a nearly symmetric mode profile of ~2.5 µm mode field size (full-width at half-maximum). We developed a high-precision measurement approach by which single-mode waveguides were characterized to have propagation loss of ~0.042 dB/cm.

scholarly journals High-Precision Measurement of a Propagation Loss of Single-Mode Optical Waveguides on Lithium Niobate On Insulator

2019 ◽  
Author(s):  
Jintian Lin ◽  
Junxia Zhou ◽  
Rongbo Wu ◽  
Min Wang ◽  
Zhiwei Fang ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
High Precision ◽  
Precision Measurement ◽  
Optical Waveguides ◽  
Single Mode ◽  
Propagation Loss ◽  
Field Size ◽  
High Precision Measurement ◽  
Mode Field ◽  
Optical Patterning

We demonstrate fabrication of single-mode optical waveguides on lithium niobate on insulator (LNOI) by optical patterning combined with chemo-mechanical polishing. The fabricated LNOI waveguides have a nearly symmetric mode profile of a mode field size of ~2.5 µm (full-width at half maximum). We develop a high-precision measurement approach by which the single mode waveguides are characterized to have a propagation loss of ~0.042 dB/cm.

GaAs/AlGaAs single‐mode optical waveguides with low propagation loss and strong optical confinement

1990 ◽  
Vol 56 (11) ◽  
pp. 990-992 ◽  
Author(s):  
M. Seto ◽  
A. Shahar ◽  
R. J. Deri ◽  
W. J. Tomlinson ◽  
A. Yi‐Yan
Keyword(s):  
Optical Waveguides ◽  
Single Mode ◽  
Propagation Loss ◽  
Optical Confinement

scholarly journals Study of a sub-wavelength scale plasmonic traveling wave amplifier with electrically pumped multiple quantum wells

2021 ◽  
Author(s):  
Ruijian Rao ◽  
Shuwen Chen ◽  
Bing Chen ◽  
Cheng Bai
Keyword(s):  
Quantum Wells ◽  
Traveling Wave ◽  
Propagation Loss ◽  
Multiple Quantum Wells ◽  
Field Size ◽  
Multiple Quantum ◽  
Mode Field ◽  
Electrically Pumped ◽  
Traveling Wave Amplifier ◽  
Sub Wavelength

Abstract We propose a hybrid gap plasmonic traveling wave amplifier (TWA) with electrically pumped multiple quantum wells (MQW). This TWA has deep sub-wavelength mode field scale and works at 1310nm window. For the polarization-independent amplification we design the InGaAlAs tensile-strain MQW. And we analyze this plasmonic TWA’s optical, electrical and thermal characteristics by finite element method. First we get the suitable trade-off point between the affordable mode propagation loss and moderate mode field size by adjusting the gap width and height. Second we find that the narrower the MQW, the higher the MQW local gain. Third, our device has good thermal performance as the plasmonic wave power is less than 5μw. Simulation results suggest that the independent polarization gain appears at 1317nm wavelength. And at this wavelength 3.60/cm mode gain and 161nm mode width are obtained as the 9.39kA/cm^2injection current and 10nm×240nm gap size.

scholarly journals Compact Optical Waveguides Based on Hybrid Index and Surface-Plasmon-Polariton Guidance Mechanisms

2007 ◽  
Vol 2007 ◽  
pp. 1-7 ◽  
Author(s):  
Min Yan ◽  
Min Qiu
Keyword(s):  
Surface Plasmon ◽  
Optical Waveguides ◽  
Surface Plasmon Polariton ◽  
Field Size ◽  
Hybrid Index ◽  
Dielectric Waveguides ◽  
Low Loss ◽  
Mode Field ◽  
Telecommunication Wavelength ◽  
Plasmon Polariton

Surface-plasmon-polariton (SPP) waveguides made of materials available in nature have, in general, been found to suffer from very high absorption loss when light confinement is beyond diffraction limit. In this paper, the possibility of combining both the conventional index-guiding and the SPP-guiding mechanisms together into one single waveguide is being explored. Such waveguides, expectedly, inherent the low-loss feature of all-dielectric waveguides as well as the superior mode field confinement possessed by SPP waveguides. By using experimentally ready materials, it is theoretically shown that compact metallodielectric waveguides can be designed with a∼500×500 nm2core size around the 1550 nm telecommunication wavelength. The examined waveguides can be interpreted as a gap SPP waveguide with an inner dielectric core. Compared to pure SPP waveguides, such hybrid waveguides have a comparable mode field size, but with significantly lower loss (∼0.05 dB/μmfor either quasi-TE or quasi-TM operation). Therefore they can be potentially deployed for a range of integrated photonic applications.

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