An Efficient All‐Plastic Organic Waveguide Solid‐State Laser Devices with Distributed Bragg Reflector

Tsutsumi, Naoto; Yamazaki, Ryo

doi:10.1002/pssa.201700663

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…The present finding is unique for the R6G laser dye. We investigated the enhancement of fluorescence and shift of ASE spectra for other dyes: pyrromethene 567 (PM567) and the electroluminescent conjugate polymer of poly[(9,9-(dihexyl)-9 H -fluorene-2,7-vinylene)- co -(1-methoxy-4-(2-ethylhexyloxy)-2,5-phenylene-vinylene)] [poly(DH-PFV- co -MEHPPV)] . No enhancement in the fluorescence or shift in ASE spectra was measured for either CA/PM567 on the P(VDF-TrFE) layer or poly(DH-PFV- co -MEHPPV) on the P(VDF-TrFE) layer.…”

Section: Results and Discussionmentioning

confidence: 99%

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Influence of an Interfacial Effect on the Laser Performance of a Rhodamine 6G/Cellulose Acetate Waveguide on a Vinylidene Fluoride Copolymer Layer

et al. 2018

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The fluorescent properties of dyes and fluorophores in condensed matter significantly affect the laser performance of organic dye lasers and fluorescent polymer lasers. Concentration quenching of fluorescence is commonly observed in condensed matter. Several approaches have been presented to suppress such quenching, such as the use of a dendrimer and the use of effective energy transfer in a guest-host system. The enhanced fluorescence of rhodamine 6G (R6G) dye on a vinylidene fluoride polymer is an alternative method for enhancing laser performance because of the roughness of the P(VDF-TrFE) surface and the interaction between polar β-crystals of P(VDF-TrFE) and R6G dye. In this paper, a significant improvement in slope efficiency (SE) is demonstrated without a significant depression in the lasing threshold for distributed feedback (DFB) and distributed Bragg reflector (DBR) lasers fabricated using an R6G-dispersed cellulose acetate (CA) matrix spin-coated onto a copolymer of vinylidene fluoride and trifluoroethylene P(VDF-TrFE) thin film. SEs of 3.4 and 1.3% were measured for DBR and DFB laser devices with CA/R6G on a P(VDF-TrFE) thin film, respectively, whereas an SE of less than 1.0% was measured for both corresponding laser devices without a P(VDF-TrFE) thin film. From the aspect of simple fabrication procedures, repeatability in device fabrication and performance, stability of the device, time for device fabrication, the present approach is the most preferable way for industrial applications, requiring only the additional step of spin-coating of a P(VDF-TrFE) thin film.

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Section: Results and Discussionmentioning

confidence: 99%

“…The present finding is unique for the R6G laser dye. We investigated the enhancement of fluorescence and shift of ASE spectra for other dyes: pyrromethene 567 (PM567) 19…”

Section: Absorption and Fluorescence Spectra Andmentioning

confidence: 99%

Influence of an Interfacial Effect on the Laser Performance of a Rhodamine 6G/Cellulose Acetate Waveguide on a Vinylidene Fluoride Copolymer Layer

et al. 2018

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“…Organic lasers have attracted wide research attention and significant applications in display, [1][2][3][4][5] anti-counterfeiting, [1,6] and medical diagnosis [7] owing to their advantages of flexibility, [8] abundant material resources, low price, and mass production potential. Acting as one of the most important parts in lasers, resonant cavities [9] have been widely researched including Fabry-Pérot cavities, [10] distributed feedback resonators, [11] distributed Bragg reflectors, [12,13] or whispering-gallery-mode microcavities. [3,14] Most of these resonant cavities have periodical changes of the refractive index or gain coefficient, providing an optical feedback loop for lasing.…”

Section: Introductionmentioning

confidence: 99%

Over 200 °C Broad‐Temperature Lasers Reconstructed from a Blue‐Phase Polymer Scaffold

et al. 2022

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Blue‐phase liquid crystal (BPLC) lasers have received extensive attention and have potential applications in sensors, displays, and anti‐counterfeiting, owing to their unique 3D photonic bandgap. However, the working temperature range of such BPLC lasers is insufficient, and investigations are required to elucidate the underlying mechanism. Herein, a broad‐temperature reconstructed laser is successfully achieved in dye‐doped polymer‐stabilized blue‐phase liquid crystals (DD‐PSBPLCs) with an unprecedented working temperature range of 25–230 °C based on a robust polymer scaffold, which combines the thermal stability and the tunability from the system. The broad‐temperature lasing stems from the high thermal stability of the robust polymerized system used, which affords enough reflected and matched fluorescence signals. The temperature‐tunable lasing behavior of the DD‐PSBPLCs is associated with the phase transition of the unpolymerized content (≈60 wt%) in the system, which endows with a reconstructed characteristic of BP lasers including a U‐shaped lasing threshold, a reversible lasing wavelength, and an obvious lasing enhancement at about 70 °C. This work not only provides a new idea for the design of broad‐temperature BPLC lasers, but also sets out important insight in innovative microstructure changes for novel multifunctional organic optic devices.

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High-Performance All-Organic DFB and DBR Waveguide Laser with Various Grating Height Fabricated by a Two-Photon Absorption DLW Method

Tsutsumi

Kaida

Kinashi

et al. 2019

Sci Rep

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Organic solid-state lasers (OSSLs) with distributed feedback (DFB) structures or distributed Bragg reflectors (DBRs) are promising for potential application in bio-sensing and hazardous materials detection. Here, the laser performances of the all-organic DFB waveguide lasers with various grating heights ranging from 0.4 to 4.7 μm were investigated. The grating structures used as the lasing cavity were fabricated using a two-photon absorption (TPA) direct laser writing (DLW) method with an SU-8 negative photoresist. The laser active layer consisted of a rhodamine 6G (R6G) laser dye and a cellulose acetate (CA) matrix. The R6G/CA solution was spin-coated onto the quartz substrate with the cavity (grating) structures to fabricate the DFB waveguide laser devices. The diffraction order of lasing ranged from m = 4 to 7. As the grating height was increased to 1.9 μm, the slope efficiency increased for all diffraction orders and the threshold decreases for each diffraction order. The dependence of the cavity (grating) length on the laser performances was investigated. The slope efficiency increased as the cavity length increased to 300 μm. The effect of the cavity (grating) position on the slope efficiency and the threshold position of the cavity (grating) was also studied. A maximum slope efficiency of 10.2% was achieved for the DFB waveguide laser device with a cavity (grating) length of 300 μm, a cavity position at 6 mm from the emission edge of the waveguide, and an aspect ratio ≈3 between the grating height of 1.74 μm and the grating width of 0.6 μm for the diffraction order m = 6 for lasing.

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An Efficient All‐Plastic Organic Waveguide Solid‐State Laser Devices with Distributed Bragg Reflector

Cited by 3 publications

References 24 publications

Influence of an Interfacial Effect on the Laser Performance of a Rhodamine 6G/Cellulose Acetate Waveguide on a Vinylidene Fluoride Copolymer Layer

Influence of an Interfacial Effect on the Laser Performance of a Rhodamine 6G/Cellulose Acetate Waveguide on a Vinylidene Fluoride Copolymer Layer

Over 200 °C Broad‐Temperature Lasers Reconstructed from a Blue‐Phase Polymer Scaffold

High-Performance All-Organic DFB and DBR Waveguide Laser with Various Grating Height Fabricated by a Two-Photon Absorption DLW Method

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