High pump efficiency of a second-order distributed feedback laser based on holographic polymer dispersed liquid crystals with preferred liquid crystal molecular orientation

Liu, Lijuan; Kong, Xiaojian; Wang, Qidong; Liu, Yonggang; Li, Xuan

doi:10.1039/c8tc03412e

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…Morphology and diffraction properties of the grating depend upon writing set-up, materials, diffusion rate, curing conditions and the phase separation process Typical morphology, the working principle and electro-optical properties of HPDLCs are thoroughly elaborated in chapter 5 of the recently published book [ 109 ]. Promising applications of HPDLCs include diffraction gratings (DGs), polymer slices (POLICRYPS), waveguides, autostereoscopic image splitter, three-dimensional (3D) data storage and photonic crystals [ 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 ].…”

Section: Applicationsmentioning

confidence: 99%

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

et al. 2020

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Polymer dispersed liquid crystals (PDLCs) have kindled a spark of interest because of their unique characteristic of electrically controlled switching. However, some issues including high operating voltage, low contrast ratio and poor mechanical properties are hindering their practical applications. To overcome these drawbacks, some measures were taken such as molecular structure optimization of the monomers and liquid crystals, modification of PDLC and doping of nanoparticles and dyes. This review aims at detailing the recent advances in the process, preparations and applications of PDLCs over the past six years.

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Section: Applicationsmentioning

confidence: 99%

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

et al. 2020

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“…Existing DFB polymer lasers have made considerable progress due to various manipulation techniques such as wavelength manipulation [ 21 , 22 , 23 , 24 , 25 , 26 ], threshold manipulation [ 27 , 28 , 29 ], intensity manipulation [ 30 , 31 ], and polarization manipulation [ 32 , 33 , 34 ]. But there are few studies about direction manipulation of DFB lasers [ 35 ] which are mainly about using the high-order DFB configuration to achieve the multi-direction emission of DFB lasers.…”

Section: Introductionmentioning

confidence: 99%

Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall

Zhai

Han

et al. 2021

Nanomaterials

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This article assembles a distributed feedback (DFB) cavity on the sidewalls of the optical fiber by using very simple fabrication techniques including two-beam interference lithography and dip-coating. The DFB laser structure comprises graduated gratings on the optical fiber sidewalls which are covered with a layer of colloidal quantum dots. Directional DFB lasing is observed from the fiber facet due to the coupling effect between the grating and the optical fiber. The directional lasing from the optical fiber facet exhibits a small solid divergence angle as compared to the conventional laser. It can be attributed to the two-dimensional light confinement in the fiber waveguide. An analytical approach based on the Bragg condition and the coupled-wave theory was developed to explain the characteristics of the laser device. The intensity of the output coupled laser is tuned by the coupling coefficient, which is determined by the angle between the grating vector and the fiber axis. These results afford opportunities to integrate different DFB lasers on the same optical fiber sidewall, achieving multi-wavelength self-aligned DFB lasers for a directional emission. The proposed technique may provide an alternative to integrating DFB lasers for applications in networking, optical sensing, and power delivery.

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“…For a right-handed chiral azobenzene compound-doped PSCLC film, the reflection wavelength can cover 1000–2400 nm and shift to the visible-light region by adjusting the concentrations of different compounds . The 4-(dicyanomethylene)-2-methyl-6-( p -dimethylaminostyryl)-4 H -pyran (DCM)-doped HPDLC grating has been fabricated and a second-order surface-emitting distributed feedback (DFB) laser first provided. , …”

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confidence: 99%

Advancements and Applications of Liquid Crystal/Polymer Composite Films

Zhou,

Liu,

Miao

et al. 2023

ACS Materials Lett.

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High pump efficiency of a second-order distributed feedback laser based on holographic polymer dispersed liquid crystals with preferred liquid crystal molecular orientation

Abstract: We report on the fabrication and characterization of a surface-emitting distributed feedback (DFB) organic semiconductor laser based on a holographic polymer dispersed liquid crystal (HPDLC) transmission grating.

Cited by 8 publications

References 31 publications

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall

Advancements and Applications of Liquid Crystal/Polymer Composite Films

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