Distributed feedback photonic crystal fibre (DFB-PCF) laser

Distributed feedback photonic crystal fibre (DFB-PCF) laser.

A distributed feedback laser is fabricated in Er3+-doped photonic crystal fibre. Preferential single-mode lasing is obtained with no special consideration of polarisation issues. The results demonstrate practical implementation of a multi-photon writing process for complex structures in these optical fibres. No hydrogen loading and no germanium are involved.

Hollow Core Photonic Crystal Fibre (HC-PCF) based Gas Sensor

We report the feasible design of the gas sensor based on Hollow-Core Photonic Crystal Fibers (HC-PCF) operating in the mid-IR. Hollow core photonic band gap fibres (HC-PBFs) are employed as gas cells due to their compactness, good integrability in optical systems and feasibility of long interaction lengths with gases. The challenge is in development and assembly of HC-PCF based gas cell where i...

All-fibre photonic crystal distributed Bragg reflector (PC-DBR) fibre laser.

We describe an Er3+-doped aluminosilicate core photonic crystal fibre laser incorporating distributed Bragg reflectors written by two-photon 193nm irradiation through an optical phase mask as the feedback elements. The laser is diode pumped at 980nm and evidence of dual linewidth laser operation close to threshold is observed. However, at higher pumping levels gain competition preferentially se...

Distributed Measurement of Brillouin Gain Spectrum in Photonic Crystal Fibre

Distributed measurements of the Brillouin gain spectrum in a photonic crystal fibre have been carried out for the first time to our knowledge. These measurements confirm the strong increase of the Brillouin threshold as resulting from the broadband and multimode nature of the Brillouin gain spectrum all along the fibre. INTRODUCTION The periodic wavelength-scale air-hole microstructure of solid...

DFB Laser Diode Dynamics with Optoelectronic Feedback