Heptagonal core anti-resonant hollow-core fiber for laser beam mode shapers

Chinese Optics Letters, Journal Year: 2025, Volume and Issue: 23(4), P. 040607 - 040607

Published: Jan. 1, 2025

Language: Английский

---

Ultrahigh Transverse Mode Purity by Enhanced Modal Filtering in Double‐Clad Single‐Ring Hollow‐Core Photonic Crystal Fiber

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(6)

Published: Feb. 11, 2024

Abstract Maintaining high fundamental mode purity in low‐loss single‐ring hollow‐core photonic crystal fiber remains a key challenge. Here double‐clad anti‐resonant‐reflecting design is reported that, through modal filtering, provides suppression of higher‐order modes while maintaining mode. The structure consists ring six thin‐walled capillaries fused to the inner wall thicker‐walled capillary that turn at single point silica outer cladding. Greater than 40 dB m −1 higher order over 6 nm wide window whose central wavelength can be tuned by adjusting gas pressure observed. novel paves way practical applications such fibers high‐quality laser beam delivery and low‐noise optical‐signal transmission.

Language: Английский

---

Timing fluctuation correction for the front end of a 100-PW laser

High Power Laser Science and Engineering, Journal Year: 2023, Volume and Issue: 11

Published: Jan. 1, 2023

Abstract The development of high-intensity ultrafast laser facilities provides the possibility to create novel physical phenomena and matter states. timing fluctuation pulses is crucial for pump–probe experiments, which one vital means observe dynamics driven by intense pulses. In this paper, we demonstrate characterization control front end a 100-PW that composed high-contrast optical parametric amplifier (seed) 200-TW chirped pulse (preamplifier). By combining jitter measurement with feedback system, seed preamplifier are synchronized reference fluctuations 1.82 4.48 fs, respectively. system will be key prerequisite stable operation provide basis potential experiments performed on laser.

Language: Английский

---

High-flux, ultraviolet-to-visible-tunable, ultrafast light source based on gas-filled capillary fibre system

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 9, 2024

Abstract Ultrafast light sources with broadband wavelength tunability, as useful tools for studying ultrafast phenomena and light-matter interactions, have attracted extensive interests in recent several decades. High-performance pulse generation simultaneously high repetition rate, photon flux, broad wavelength-tuning range covering deep ultraviolet to visible has, however, proven difficult realize. Here, we demonstrate that through cascading two nonlinear compression stages (one is based on a multi-pass-cell cavity the other 1-m length of hollow capillary fibre), high-repetition-rate pulses from an industrial-grade high-power picosecond laser can be efficiently compressed ~15 fs durations, giving rise ultrahigh ratio ~74. The generated few-cycle optical pulses, exhibiting excellent beam quality stability, were used our set-up drive high-efficiency dispersive-wave-emission process another gas-filled fibre, delivering short-wavelength μJ-level energy, 25 kHz/100 kHz >10 16 phs/s flux continuous ability 200 nm 700 nm. table-top system, featuring coverage, may many potential applications advanced spectroscopy ultrafast-optics experiments.

Language: Английский

---

基于空芯反谐振光纤的高功率激光传输技术研究进展（特邀）

Chinese Journal of Lasers, Journal Year: 2024, Volume and Issue: 51(19), P. 1901002 - 1901002

Published: Jan. 1, 2024

---

Negative curvature hollow core fiber-functionalized cascaded structure for curvature sensing

Published: Oct. 12, 2023

We demonstrate a high-sensitivity curvature sensor based on the negative hollow core fiber (NCHCF). The graded index (GIF) is introduced between single mode (SMF) and NCHCF for of cascaded structure SMF-GIF-NCHCF-GIF-SMF. coupling efficiency can be improved by cascading GIF. experimental results show that there are two coexisted mechanisms in structure, where multi-mode interference (MMI) sensitive to change anti-resonance (AR) insensitive change. obtained sensitivity MMI up -4.97 nm/m-1 . With advantages compactness, flexibility, high so on, shows prospects structural health monitoring, medical applications, energy exploration other fields.

Language: Английский

---

Towards hollow-core fiber polarization beam splitting and combining

Published: Jan. 1, 2023

Towards hollow core fiber polarization beam splitting and combining

Language: Английский

---