scholarly journals Fabrication of an Optical Waveguide-Mode-Field Compressor in Glass Using a Femtosecond Laser

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1926 ◽  
Author(s):  
Zhengming Liu ◽  
Yang Liao ◽  
Zhenhua Wang ◽  
Zhihao Zhang ◽  
Zhaoxiang Liu ◽  
...  
Keyword(s):  
Stress Field ◽  
Femtosecond Laser ◽  
Optical Waveguide ◽  
Waveguide Mode ◽  
Single Mode ◽  
Field Size ◽  
Optical Mode ◽  
Mode Field ◽  
Single Mode Waveguide

We report on fabrication of an optical waveguide-mode-field compressor in glass using a femtosecond laser. Our approach is based on building up a stress field within the waveguiding area which is realized by sandwiching the waveguide between a pair of laser-induced-modification-tracks. To induce an adiabatic conversion of the optical mode in the waveguide, the tracks are intentionally designed to be tapered along the waveguide. We show that our technique can allow for reducing the mode field size in a single mode waveguide from more than 10 μm to around 7 μm.

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 Преобразование мод в гибридных волноводных структурах на основе ниобата лития для согласования со стандартным одномодовым оптическим волокном

2022 ◽  
Vol 92 (1) ◽  
pp. 113
Author(s):  
М.В. Парфенов ◽  
П.М. Агрузов ◽  
И.В. Ильичев ◽  
А.А. Усикова ◽  
А.В. Шамрай
Keyword(s):  
Titanium Dioxide ◽  
Theoretical Analysis ◽  
Waveguide Mode ◽  
Transformation Efficiency ◽  
Single Mode ◽  
Optical Mode ◽  
Waveguide Devices ◽  
Hybrid Waveguide ◽  
Waveguide Fabrication ◽  
Waveguide Device

Topology of a hybrid waveguide device, which performs an effective transformation of a standard gradient titanium in-diffused waveguide mode to a hybrid waveguide mode, is considered. With its help a rather large optical mode with size optimal for coupling with standard single-mode fibers can be converted to a mode with a smaller size. Two the most perspective materials for hybrid waveguide fabrication were considered: silicon and titanium dioxide. The theoretical analysis has shown that transformation efficiency of more than 99% is achievable for waveguide devices based on titanium dioxide with contact lithography resolution.

Photo-structurable polymer for interlayer single-mode waveguide fabrication by femtosecond laser writing

2017 ◽  
Vol 66 ◽  
pp. 110-116 ◽  
Author(s):  
Ho Hoai Duc Nguyen ◽  
Uwe Hollenbach ◽  
Stefan Pfirrmann ◽  
Ute Ostrzinski ◽  
Karl Pfeiffer ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Single Mode ◽  
Laser Writing ◽  
Single Mode Waveguide ◽  
Waveguide Fabrication

Optical mode field transformers integrated at the end of single mode fibers

2005 ◽  
Author(s):  
Th. Windel ◽  
S. Hemrungrote ◽  
U. H. P. Fischer
Keyword(s):  
Single Mode ◽  
Optical Mode ◽  
Mode Field

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.

scholarly journals Low loss and high performance interconnection between standard single-mode fiber and antiresonant hollow-core fiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dmytro Suslov ◽  
Matěj Komanec ◽  
Eric R. Numkam Fokoua ◽  
Daniel Dousek ◽  
Ailing Zhong ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Higher Order ◽  
Field Size ◽  
Hollow Core ◽  
Low Loss ◽  
Alternative Mode ◽  
Mode Field ◽  
Core Fiber

AbstractWe demonstrate halving the record-low loss of interconnection between a nested antiresonant nodeless type hollow-core fiber (NANF) and standard single-mode fiber (SMF). The achieved interconnection loss of 0.15 dB is only 0.07 dB above the theoretically-expected minimum loss. We also optimized the interconnection in terms of unwanted cross-coupling into the higher-order modes of the NANF. We achieved cross-coupling as low as −35 dB into the LP$$_{11}$$ 11 mode (the lowest-loss higher-order mode and thus the most important to eliminate). With the help of simulations, we show that the measured LP$$_{11}$$ 11 mode coupling is most likely limited by the slightly imperfect symmetry of the manufactured NANF. The coupling cross-talk into the highly-lossy LP$$_{02}$$ 02 mode ($$>2000$$ > 2000  dB/km in our fiber) was measured to be below −22 dB. Furthermore, we show experimentally that the anti-reflective coating applied to the interconnect interface reduces the insertion loss by 0.15 dB while simultaneously reducing the back-reflection below −40 dB over a 60 nm bandwidth. Finally, we also demonstrated an alternative mode-field adapter to adapt the mode-field size between SMF and NANF, based on thermally-expanded core fibers. This approach enabled us to achieve an interconnection loss of 0.21 dB and cross-coupling of −35 dB into the LP$$_{11}$$ 11 mode.

Mode field diameter measurement conditions in single-mode fibres

1989 ◽  
Vol 25 (8) ◽  
pp. 493
Author(s):  
M. Ohashi ◽  
N. Shibata ◽  
K. Sato
Keyword(s):  
Single Mode ◽  
Diameter Measurement ◽  
Mode Field ◽  
Mode Field Diameter

Fabrication of single-mode circular optofluidic waveguides in fused silica using femtosecond laser microfabrication

2021 ◽  
Vol 141 ◽  
pp. 107118
Author(s):  
Zhengming Liu ◽  
Jian Xu ◽  
Zijie Lin ◽  
Jia Qi ◽  
Xiaolong Li ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Single Mode ◽  
Fused Silica ◽  
Laser Microfabrication ◽  
Optofluidic Waveguides
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