Demonstration of tuning thermal coefficient of delay of photonic bandgap hollow-core fiber by surface mode

Chaochao Shen; Dakun Wu; Xinyue Zhu; Si Chen; Binbin Lu; Hongwen Li; Fei Yu; Xiaojun Chen; Jonathan Knight

doi:10.1016/j.yofte.2025.104429

Demonstration of tuning thermal coefficient of delay of photonic bandgap hollow-core fiber by surface mode

Chaochao Shen, Dakun Wu, Xinyue Zhu, Si Chen, Binbin Lu, Hongwen Li, Fei Yu, Xiaojun Chen, Jonathan Knight

Research output: Contribution to journal › Article › peer-review

Abstract

Photonic-bandgap hollow-core fibers (PBG-HCFs) present a low thermal sensitivity of phase dependence, and zero or negative thermal coefficient of delays (TCDs) are possible to reach. Previously, we proposed a new concept of utilizing the surface-mode (SM) engineering in the tuning of TCD of PBG-HCF and numerically demonstrated a broad TCD range from −400 ps/km/K to 400 ps/km/K [Opt. Express 30, 222–231 (2022)]. In this paper, we design and fabricate a 19-cell PBG-HCF, and demonstrate the surface mode tuning of TCD of PBG-HCF by experiment for the first time to the best of our knowledge. A measured TCD range from −166 ps/km/K to 217 ps/km/K is within a 36 nm transmission window at the telecom C band.

Original language	English
Article number	104429
Journal	Optical Fiber Technology
Volume	95
Early online date	30 Sept 2025
DOIs	https://doi.org/10.1016/j.yofte.2025.104429
Publication status	Published - 31 Dec 2025

Data Availability Statement

Data will be made available on request.

Keywords

Photonic bandgap hollow core fiber
Surface mode
Thermal coefficient of delay

ASJC Scopus subject areas

Control and Systems Engineering
Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Instrumentation
Electrical and Electronic Engineering

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Cite this

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title = "Demonstration of tuning thermal coefficient of delay of photonic bandgap hollow-core fiber by surface mode",

abstract = "Photonic-bandgap hollow-core fibers (PBG-HCFs) present a low thermal sensitivity of phase dependence, and zero or negative thermal coefficient of delays (TCDs) are possible to reach. Previously, we proposed a new concept of utilizing the surface-mode (SM) engineering in the tuning of TCD of PBG-HCF and numerically demonstrated a broad TCD range from −400 ps/km/K to 400 ps/km/K [Opt. Express 30, 222–231 (2022)]. In this paper, we design and fabricate a 19-cell PBG-HCF, and demonstrate the surface mode tuning of TCD of PBG-HCF by experiment for the first time to the best of our knowledge. A measured TCD range from −166 ps/km/K to 217 ps/km/K is within a 36 nm transmission window at the telecom C band.",

keywords = "Photonic bandgap hollow core fiber, Surface mode, Thermal coefficient of delay",

author = "Chaochao Shen and Dakun Wu and Xinyue Zhu and Si Chen and Binbin Lu and Hongwen Li and Fei Yu and Xiaojun Chen and Jonathan Knight",

year = "2025",

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doi = "10.1016/j.yofte.2025.104429",

language = "English",

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journal = "Optical Fiber Technology",

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T1 - Demonstration of tuning thermal coefficient of delay of photonic bandgap hollow-core fiber by surface mode

AU - Shen, Chaochao

AU - Wu, Dakun

AU - Zhu, Xinyue

AU - Chen, Si

AU - Lu, Binbin

AU - Li, Hongwen

AU - Yu, Fei

AU - Chen, Xiaojun

AU - Knight, Jonathan

PY - 2025/12/31

Y1 - 2025/12/31

N2 - Photonic-bandgap hollow-core fibers (PBG-HCFs) present a low thermal sensitivity of phase dependence, and zero or negative thermal coefficient of delays (TCDs) are possible to reach. Previously, we proposed a new concept of utilizing the surface-mode (SM) engineering in the tuning of TCD of PBG-HCF and numerically demonstrated a broad TCD range from −400 ps/km/K to 400 ps/km/K [Opt. Express 30, 222–231 (2022)]. In this paper, we design and fabricate a 19-cell PBG-HCF, and demonstrate the surface mode tuning of TCD of PBG-HCF by experiment for the first time to the best of our knowledge. A measured TCD range from −166 ps/km/K to 217 ps/km/K is within a 36 nm transmission window at the telecom C band.

AB - Photonic-bandgap hollow-core fibers (PBG-HCFs) present a low thermal sensitivity of phase dependence, and zero or negative thermal coefficient of delays (TCDs) are possible to reach. Previously, we proposed a new concept of utilizing the surface-mode (SM) engineering in the tuning of TCD of PBG-HCF and numerically demonstrated a broad TCD range from −400 ps/km/K to 400 ps/km/K [Opt. Express 30, 222–231 (2022)]. In this paper, we design and fabricate a 19-cell PBG-HCF, and demonstrate the surface mode tuning of TCD of PBG-HCF by experiment for the first time to the best of our knowledge. A measured TCD range from −166 ps/km/K to 217 ps/km/K is within a 36 nm transmission window at the telecom C band.

KW - Photonic bandgap hollow core fiber

KW - Surface mode

KW - Thermal coefficient of delay

UR - https://www.scopus.com/pages/publications/105017231094

U2 - 10.1016/j.yofte.2025.104429

DO - 10.1016/j.yofte.2025.104429

M3 - Article

AN - SCOPUS:105017231094

SN - 1068-5200

VL - 95

JO - Optical Fiber Technology

JF - Optical Fiber Technology

M1 - 104429

ER -

Demonstration of tuning thermal coefficient of delay of photonic bandgap hollow-core fiber by surface mode

Abstract

Data Availability Statement

Keywords

ASJC Scopus subject areas

Access to Document

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