Tapered-beam expander for single-mode optical-fibre gap devices

Magneto-Optical properties of GaP single crystal

The temperature dependence of magneto-optical and magneto-photoconductivity measurements were carried out in the range of (200-330) K. A home made optical cryostat was used for the measurements. The measured room temperature value of the energy gap was found to be 2.211 eV. The temperature coefficient of energy gap was found to be -5.48×10-4 eV/K obtained by the optical absorption method and -4...

1 Watt Er / Yb Single - mode Superfluorescent Optical Fibre Source

We describe a single-mode superfluorescent Er/Yb optical fibre source capable of generating greater than 1 Watt of output power. The spectral bandwidth of the source can be varied between 0.5 and 4 nm by filtering. Superfluorescent sources based on rare-earth doped single mode fibres [ 1,2] are potentially useful in many applications requiring high brightness combined with broad bandwidth and l...

single fine - mode aerosol particles using a Bessel beam optical

Numerical Simulations of Pinhole and Single Mode Fibre Spatial Filters for Optical Interferometers

We use a numerical simulation to investigate the effectiveness of pinhole spatial filters at optical/IR interferometers and to compare them with single-mode optical fibre spatial filters and interferometers without spatial filters. We show that fringe visibility measurements in interferometers containing spatial filters are much less affected by changing seeing conditions than equivalent measur...

On-chip optical mode exchange using tapered directional coupler

We present an on-chip optical mode exchange between two multiplexed modes by using tapered directional couplers on silicon-on-insulator platform. The device consisting of mode multiplexing and mode exchange is compact with relatively large fabrication error tolerance. The simulation results show efficient higher order mode excitation and mode exchange. A low excess loss less than 0.5 dB and hig...