Optimization of the interlayer distance for low-loss and low-crosstalk double-layer polymer optical waveguides.
Opt Express
; 31(15): 23754-23767, 2023 Jul 17.
Article
em En
| MEDLINE
| ID: mdl-37475219
ABSTRACT
The interlayer distance optimized for low-loss and low-crosstalk double-layer polymer optical waveguides was investigated to enhance their transmission performance. Simulations were conducted to determine the minimal interlayer distances for double-layer optical waveguides with different core sizes. An optimal interlayer distance of 24â
µm was identified for a 20â
µm × 20â
µm double-layer waveguide, which ensured interlayer crosstalk below -30â
dB when roughness remained under 80â
nm. The double-layer waveguides were fabricated employing ultraviolet lithography combined with the overlay alignment method. Based on experimental optimization, the important fabrication parameters were optimized, such as a plasma treatment time of 10 s, a core exposure dose of 500 mJ/cm2, and a cladding exposure dose of 240 mJ/cm2. Additionally, the fabricated double-layer waveguides, with an interlayer distance of 24.5â
µm, exhibited low transmission losses of less than 0.25â
dB/cm at 850â
nm and 0.40â
dB/cm at 1310â
nm, respectively. The low interlayer crosstalk values were less than -52â
dB at 850â
nm and -60â
dB at 1310â
nm, respectively. The agreement between the experimental results and the simulation findings indicates that this method offers a promising approach for fabricating double-layer waveguides with good performances.
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1
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Opt Express
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
2023
Tipo de documento:
Article