Coupling efficiency of a laser diode to a single-mode fiber via a microlens on the fiber tip

Lu, Shengqiang; Zhang, Fan; Xu, Cong; Duan, Ji’an

doi:10.1016/j.yofte.2021.102766

Cited by 10 publications

(2 citation statements)

References 36 publications

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“…Under the influence of actuation voltage, the signal-receiving fiber, anchored at the central point of PCT's end face, undergoes axial and radial translations, as well as radial rotations resulting from the deflection of the tube wall. Notably, when the amplitude of translation or rotation surpasses a specific threshold, a conspicuous reduction in fiber coupling efficiency is observed 14,15 . Presently, there exists a paucity of quantitative research elucidating the relationship between the angular deflection amplitude of the fiber and its coupling efficiency 16,17 .…”

Section: Introductionmentioning

confidence: 99%

Influence of nutating deflection on fiber coupling efficiency for fiber optic nutator

Peng,

Ruan,

Wang

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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In the relay optics of the space laser communication terminal's Acquisition, Pointing, and Tracking (APT) system, the Fiber Optic Nutator (FON), based on a Piezoelectric Ceramic Tube (PCT), is capable of actively achieving signal light reception and coupling through the implementation of energy feedback compensation algorithms with a lightweight design approach. Throughout the fiber nutation process, the deflection amplitude of the receiving fiber's end face significantly impacts the fiber coupling efficiency of the fiber optic nutator. To quantify this influence, the curve depicting the effect of the relative aperture (D/f) of the relay optics focusing lens on fiber coupling efficiency is initially computed. Notably, when D/f=0.213, the fiber coupling efficiency attains its theoretical maximum of 0.813. Subsequently, the composite motion of the fiber end face in three-dimensional space is deconstructed into radial and axial translations, along with rotations based on the axial direction. Through meticulous simulation calculations, it is ascertained that the fiber coupling efficiency decreases by more than 5% when the radial displacement r of the fiber end face exceeds 3.65μm, or when the axial displacement d surpasses 0.25mm, or when the angular deviation θ exceeds 0.08°. These findings offer quantifiable criteria for the dimensional selection of the PCT under varied application conditions, providing constructive guidance for determining core structural design parameters of the fiber optic nutator.

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Section: Introductionmentioning

confidence: 99%

Influence of nutating deflection on fiber coupling efficiency for fiber optic nutator

Peng,

Ruan,

Wang

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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show abstract

“…Researchers initially used spatially separated coaxial lenses to collect the light scattered and emitted from objects then couple it into fiber for the optical sensor and imaging, which increased the volume and packaging difficulty of the optical fiber probe [7,8] . Microlens integrated on fiber tip by LOT technology is a preliminary exploration to solve these problems, which can also effectively reduce the difficulty of device packaging and eliminate the tedious alignment process [9][10][11][12][13] . However, the fabrication of these lenses is complicated with strict requirements for fiber materials [14] .…”

Section: Introductionmentioning

confidence: 99%

Polarization-insensitive broadband metalens integrated on photonic crystal fiber tip

Dai

Wang

Liu

et al. 2023

Nanophotonics, Micro/Nano Optics, and Plasmonics VIII

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Fiber-tip lens not only makes the optical system more flexible and compact, but also eliminates complex alignment process, which makes it widely used in the fields of spatial light-fiber coupling, laser direct writing and fiber optic imaging. Compared to traditional glass lens, metalens is easier to be processed and integrated on fiber tip because of its special planar structure and small footprint. Fiber-tip metalens with high efficiency achromatic focusing ability has great application potential in multimode endoscope and other optical fiber imaging systems, so we designed a metalens with Si nanopost array that can achieve broadband focusing in the wavelength range of 1.2μm -1.6μm. For realizing broadband achromatic focusing, it is the crucial to meet the focusing phase and phase dispersion requirements simultaneously. Then we built a library of unit pillars with three kinds of cross-sectional geometries to provide diverse focusing phase (φ) and phase dispersion (δφ) combinations and defined a phase-dispersion space composed of parameters. In order to find the optimal unit pillar at each cell, we regarded the minimum Euclid distance between the points from the library and the target point in the phase-dispersion space as the criterion. Photonic crystal fiber (PCF) is a suitable integration platform for metalens because of the large core diameter and good dispersion property, so the PCF guided mode and plane wave are selected to lunch into the metalens for comparison and verification in the present work. The simulation results demonstrated that the metalens had a good achromatic focusing performance in the target wavelength band and changed little at different polarization of the source, which showed a good polarization-insensitive property.

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The coupling study between multi-channel laser diodes and multimode fiber in a fiber pump laser

Ma,

Sun,

Yan

et al. 2024

Opt Quant Electron

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Coupling efficiency of a laser diode to a single-mode fiber via a microlens on the fiber tip

Cited by 10 publications

References 36 publications

Influence of nutating deflection on fiber coupling efficiency for fiber optic nutator

Influence of nutating deflection on fiber coupling efficiency for fiber optic nutator

Polarization-insensitive broadband metalens integrated on photonic crystal fiber tip

The coupling study between multi-channel laser diodes and multimode fiber in a fiber pump laser

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