Single and double amplified recirculating delay lines as fibre-optic filters

Analysis of double-parallel amplified recirculating optical-delay lines.

A novel method of analysis of double-parallel amplified recirculating optical-delay lines (DPAROD) is presented. The location of the maxima and the minima of the transfer function for this configuration is calculated and experimentally demonstrated. The influence of different parameters, such as the coupling coefficients, gains, lengths of the fiber loops and fractional losses of the directiona...

Fiber-optic Delay Lines

Optically driven recirculating delay lines, often used in fiber-optic signal processors, convert the source phase noise to spectrally structured intensity noise at the loop output. This spectrum is characterized by deep notches at zero frequency as well as at other multiples of l/(loop delay). An expression is derived for the power spectral density of the output noise. The formulae obtained, ar...

Quantum-secured data transmission in urban fibre-optic communication lines

A.V. Duplinskiy, 2 E.O. Kiktenko, 3 N.O. Pozhar, M.N. Anufriev, R.P. Ermakov, A.I. Kotov, A.V. Brodsky, R.R. Yunusov, V.L. Kurochkin, A.K. Fedorov, 6, ∗ and Y.V. Kurochkin Russian Quantum Center, Skolkovo, Moscow 143025, Russia Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia Steklov Mathematical Institute of Russian Academy of Sciences, Moscow 119991, Russi...

Design and Performance of Ka-Band Fiber-Optic Delay Lines

Fibre-Optic Endoscopy

At last a book on gastrointestinal fibre-optic endoscopy which is not another collection of beautiful photographs, but rather a source of useful information for the practicing endoscopist. This book will be of value to all Endoscopy Units, but particularly to new and developing services. In this rapidly growing field there is need for guidance from an experienced group. Emphasis is placed on th...