Femtosecond Laser Modification of Silica Optical Waveguides for Potential Bragg Gratings Sensing

Chen, Jian; Feng, Jijun; Liu, Haipeng; Chen, Wenbin; Guo, Jiahao; Liao, Yang; Shen, Jie; Li, Xuefeng; Huang, H.; Zhang, Dawei

doi:10.3390/ma15186220

Cited by 3 publications

(1 citation statement)

References 47 publications

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“…Moreover, the DLW process has a great advantage in the tailoring and integration of functionally advanced nanodevices with a designed configuration. DLW has been demonstrated to be successful in fabricating various micro- and nanodevices for many applications [ 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Therefore, the introduction of DLW technology in the fabrication of QD–polymer nanocomposites is an effective choice to compensate for the existing deficiencies of conventional methods.…”

Section: Introductionmentioning

confidence: 99%

Direct Laser Writing of Functional QD–Polymer Structure with High Resolution

et al. 2023

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Promising direct laser writing (DLW) technology has been introduced to process functional quantum dot (QD)–polymer nanocomposites. The results reveal that after surface modification, the QDs are compatible with the SR399 monomer, and the homogeneous incorporation of QDs is accordingly obtained owing to the copolymerization and resultant cross-linking of QDs into SR399 resin under DLW processing with a laser wavelength (λ) of 532 nm. Moreover, compared with other scholars, we have proved that the surface modified QDs incorporated into the nanocomposites that can be successfully processed via DLW can reach a concentration of up to 150 mg/mL. Owing to the threshold behavior and nonlinear nature of the DLW process, it is feasible to modify the attendant exposure kinetics and design lines of any small size by selecting an appropriate laser power (P) and scan speed (v). The superfine feature size of 65 nm (λ/8) of the red QD–polymer suspended line can be tailored by applying the optimized P of 15 mW and v of 700 μm/s, and the finest green QD–polymer suspended line also reaches 65 nm (λ/8) with the optimized P of 14 mW and v of 250 μm/s used. Moreover, DLW processed QD–polymer structures present strong and homogeneous photoluminescence emission, which shows great potential for application in high-resolution displays, anti-counterfeit technology, and optical encryption. Additionally, the two types of long pass QD–polymer absorptive filters prepared by DLW exhibit superior optical performance with a considerably high transmittance of more than 90% for red QD–polymer block filter, and over 70% for green QD–polymer block filter in the transmittance region, which means that different filters with specific performance can be easily customized to meet the demand of various microdevices. Therefore, the DLW process can be applied to produce geometrically complex micro- and nanoscale functional structures, which will contribute to the development of advanced optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Direct Laser Writing of Functional QD–Polymer Structure with High Resolution

et al. 2023

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Low-kappa DBR grating filters on an InP generic photonic integration foundry platform

Kumar,

Hänsel,

Castera

et al. 2024

J. Opt. Soc. Am. B

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We demonstrate narrow-bandwidth, low-kappa, distributed Bragg reflector (DBR) grating filters on an indium phosphide (InP) generic foundry platform. With the varying corrugation widths of the DBR grating, we achieve flexibility in the design of the coupling coefficients from 10 to 50cm−1, which correspond to grating bandwidths of 0.68 nm to 1.28 nm, respectively. These values are experimentally observed and agree well with the theoretical analysis. The DBR grating is based on periodic rectangular grooves in quaternary material that is placed between the waveguide core and cladding region. Such configurations of the DBR grating provide a low propagation loss of ∼2dB/cm near the telecom band around 1550 nm.

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