Large mode area double-layer all-solid anti-resonant fiber for high-power fiber lasers

Xing, Zhen; Wang, Xin; Gu, Shuai; Lou, Shuqin

doi:10.1016/j.rinp.2021.104700

Cited by 19 publications

(9 citation statements)

References 19 publications

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“…Fabrication of doped solid fibers is a mature technology and one possible scheme for fabrication of an all solid antiresonant fiber is discussed in Ref. [23]. It employs insertion of doped capillaries fabricated using outside vapor deposition technique into dopedcore preform using ultrasonic drilling.…”

Section: High Efficiency 976 Nm Lasing In Ybarfmentioning

confidence: 99%

All-solid antiresonant fiber design for high-efficiency three-level lasing in ytterbium-doped fiber lasers

Goel

Yoo

2022

Opt. Lett.

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We propose and investigate an all-solid ytterbium-doped antiresonant fiber (YbARF) design to inherently suppress four-level lasing with >20 dB/m of selective loss and achieve high-efficiency three-level lasing while maintaining near-diffraction-limited operation with an ultra-large mode area of approximately 3630 µm2. The YbARF is designed such that the high-gain wavelengths corresponding to four-level lasing lie in the resonance band characterized by high confinement loss. This enables three-level lasing with high efficiency in a short (0.8-m-long) YbARF, making it a potential candidate for high-peak-power ultrafast lasers at 976 nm. We discuss fiber design considerations and detailed simulation results for three-level lasing performance in the YbARF, which promises >85% lasing efficiency in a single-pass pump configuration. These design concepts can be easily extended to suppress high-gain wavelengths in other rare-earth-doped (e.g., with thulium, erbium, and neodymium) fiber amplifiers or lasers.

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Section: High Efficiency 976 Nm Lasing In Ybarfmentioning

confidence: 99%

All-solid antiresonant fiber design for high-efficiency three-level lasing in ytterbium-doped fiber lasers

Goel

Yoo

2022

Opt. Lett.

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“…These ARFs promise to achieve effective single mode operation for core sizes up to 100 µm 7 with ultra-large MFAs ~3000-5000 µm 2 . These all-solid ARFs retain all the qualities of the hollow-core ARFs, such as simple cladding structure and large bandwidth of operation but suffer from comparatively higher confinement losses (CL), e.g., ~10 -2 dB/m in single layer structures and ~10 -3 dB/m in dual-layer structures 10 . This is due to a relatively low-refractive index contrast between silica core and germanium-doped antiresonant rings.…”

Section: Introductionmentioning

confidence: 99%

All-solid antiresonant fiber design with hybrid light guidance mechanism

Goel¹,

Yoo²,

Chang³

2023

Fiber Lasers XX: Technology and Systems

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Large mode area (LMA) fibers form an important part of high-power fiber lasers. There is significant research interest in achieving larger mode field area (MFA) for output power scaling and it is equally desirable to have single-mode operation in these fibers to maintain a good beam quality and suppress transverse mode instabilities. An increase in MFA is typically associated with high sensitivity to bend-induced losses and mode-shrinkage, necessitating several ultra-LMA fiber designs to be supported by thick outer jackets to form a rod-shape fiber. We present a hybrid light guidance mechanism in an all-solid antiresonant fiber, which combines antiresonance guidance with total internal reflection guidance to reduce the confinement loss and bending-induced losses by orders of magnitude. Low-index rods are strategically placed in the cladding to cover the gaps between the antiresonant elements to reduce confinement loss in straight fiber and suppress bending-induced leakage loss by orders of magnitude. We present detailed numerical analysis of a typical hybrid-guidance antiresonant fiber (HGARF) with core diameter 80 µm, optimized for operation in 1 µm wavelength range. The wavelength range of operation in the HGARF is decided solely by the wall thickness of the antiresonant elements and therefore the design principles can be extended to the 2 µm wavelength range.

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“…Anti-resonant fibers (ARFs) have drawn significant attention owing to their outstanding ability to suppress higher order modes (HOMs) for large fundamental mode area operation and low-cost fabrication. Recently, solid-core ARFs (SC ARFs) have been proposed and designed for high-power fiber laser generation and transmission [1,2]. To realize large-modearea (LMA) single-mode (SM) operation, optimized fiber structure design is generally required to obtain high confinement losses (CLs) for HOMs even with large mode field area (MFA).…”

Section: Introductionmentioning

confidence: 99%

“…To realize large-modearea (LMA) single-mode (SM) operation, optimized fiber structure design is generally required to obtain high confinement losses (CLs) for HOMs even with large mode field area (MFA). In 2021, Xing et al proposed a double-layer SC-ARF to increase the MFA to 3030 μm 2 with the CLs of HOMs larger than 6 dB/m at 1.064 μm [2]. As to some specific applications, such as coherent optical communication, polarization maintaining (PM) fiber is preferred to sustain the polarization state of the transmitted light.…”

Section: Introductionmentioning

confidence: 99%

Polarization-maintaining large-mode-area solid-core anti-resonant fiber at 1064 nm

Tian¹,

Fu²,

Sheng³

et al. 2023

Fiber Lasers XX: Technology and Systems

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A polarization-maintaining large-mode-area single-mode solid-core anti-resonant fiber is proposed for the first time in this work based on a double-layer structure. Specifically, the designed fiber obtains a mode field area up to 2135 μm2 at 1.064 μm while exhibiting a birefringence of 1.3×10-5. Single-mode operation can be guaranteed with the confinement losses of all higher order modes exceeding 10 dB/m.

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Large mode area double-layer all-solid anti-resonant fiber for high-power fiber lasers

Cited by 19 publications

References 19 publications

All-solid antiresonant fiber design for high-efficiency three-level lasing in ytterbium-doped fiber lasers

All-solid antiresonant fiber design for high-efficiency three-level lasing in ytterbium-doped fiber lasers

All-solid antiresonant fiber design with hybrid light guidance mechanism

Polarization-maintaining large-mode-area solid-core anti-resonant fiber at 1064 nm

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