Hongdan Wan
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View article: Inverse design and demonstration of on-chip silicon high-order mode pass filter
Inverse design and demonstration of on-chip silicon high-order mode pass filter Open
We propose a concept of a high-order mode (HOM) pass filter based on the inverse-designed mode-routing, which enables an ultra-compact footprint and broad bandwidth. To validate the concept, we experimentally demonstrate two types of HOM p…
View article: Label-free, ultra-low detection limit DNA biosensor using high quality optical microcavity functionalized by DNA tetrahedral nanostructure probes
Label-free, ultra-low detection limit DNA biosensor using high quality optical microcavity functionalized by DNA tetrahedral nanostructure probes Open
This study proposes and demonstrates a novel label-free DNA biosensor using high quality optical microcavity functionalized by 3D DNA nanostructure probes. To achieve ultra-low limit DNA biosensing, optical sensing interface of the hollow-…
View article: Double-parameter sensing of voltage and magnetic field based on photonic crystal fiber
Double-parameter sensing of voltage and magnetic field based on photonic crystal fiber Open
In this paper, a new type of photonic crystal fiber (PCF) sensor is proposed for detecting the voltage and magnetic field simultaneously. In the PCF, an air hole of the cladding is coated with gold film and filled with the liquid crystal, …
View article: Multi-Parameter Sensors Based on Optical Reflective Coupler Probe
Multi-Parameter Sensors Based on Optical Reflective Coupler Probe Open
We propose and demonst rate multi-parameter sensors based on optical reflective coupler probe (ORCP), for detection of liquid level, temperature, and refractive index (RI). Single-mode fiber ORCP (S-ORCP), few-mode fiber ORCP (F-ORCP) and …
View article: Optical Property of Polarization-Maintaining Fiber Taper for Tunable Multi-Wavelength Fiber Laser Generation
Optical Property of Polarization-Maintaining Fiber Taper for Tunable Multi-Wavelength Fiber Laser Generation Open
We investigate optical property of polarization-maintaining fiber taper (PMFT) for tunable multi-wavelength laser generation in a fiber ring cavity. A panda-type polarization fiber is fused and tapered into a fiber taper with a diameter of…
View article: Optofluidic microcapillary biosensor for label-free, low glucose concentration detection
Optofluidic microcapillary biosensor for label-free, low glucose concentration detection Open
We demonstrate label-free detection of low glucose concentration based on whispery gallery mode resonance in an optofluidic microcapillary (OFMC) biosensor. The wall surface of the OFMC is bio-chemically functionalized to detect cellular-l…
View article: Linear‐cavity mode‐locked fibre laser with cylindrical vector beam generation
Linear‐cavity mode‐locked fibre laser with cylindrical vector beam generation Open
A cylindrical vector beam (CVB)‐pulsed fibre laser with compact linear‐cavity configuration has been demonstrated, using a two‐mode fibre (TMF) Bragg grating (TM‐FBG) for mode discrimination and a semiconductor saturable absorber mirror (S…
View article: A 1- $\mu$ m Cylindrical Vector Beam Fiber Ring Laser Based on a Mode Selective Coupler
A 1- $\mu$ m Cylindrical Vector Beam Fiber Ring Laser Based on a Mode Selective Coupler Open
We propose and demonstrate a continuous-wave all-fiber ring laser generating cylindrical vector beams (CVBs) using a MSC as transverse mode converter and mode splitter. The MSC is fabricated by a novel method free of pre-tapering, achievin…
View article: High efficiency mode-locked, cylindrical vector beam fiber laser based on a mode selective coupler
High efficiency mode-locked, cylindrical vector beam fiber laser based on a mode selective coupler Open
We propose and demonstrate an all-fiber passively mode-locked laser with a figure-8 cavity, which generates pulsed cylindrical vector beam output based on a mode selective coupler (MSC). The MSC made of a two mode fiber and a standard sing…
View article: An Injection-Locked Single-Longitudinal-Mode Fiber Ring Laser With Cylindrical Vector Beam Emission
An Injection-Locked Single-Longitudinal-Mode Fiber Ring Laser With Cylindrical Vector Beam Emission Open
We demonstrate a fiber ring laser with narrow bandwidth single-longitudinal-mode cylindrical vector beam (CVB) output at C-band wavelength range for the first time to the best of our knowledge. A step index two-mode fiber Bragg grating is …
View article: Tunable, ultra-narrow-band optical filter based on a whispering gallery mode hybrid-microsphere
Tunable, ultra-narrow-band optical filter based on a whispering gallery mode hybrid-microsphere Open
We demonstrate an ultra-narrow-band optical filter based on a hybrid-microsphere consisting of a coated SiO2 microsphere. As compared to the SiO2 microsphere, the hybrid-microsphere produces a quality factor of >108, a transmission spectru…
View article: Focus modulation of cylindrical vector beams by using 1D photonic crystal lens with negative refraction effect
Focus modulation of cylindrical vector beams by using 1D photonic crystal lens with negative refraction effect Open
Sub-wavelength focusing of cylindrical vector beams (CVBs) has attracted great attention due to the specific physical effects and the applications in many areas. More powerful, flexible and effective ways to modulate the focus transversall…