TGG crystals characterized in the High Power facility. Faraday magnetic system during the assembling TGG crystal installation in its copper holder The Faraday isolator prototype for Advanced Virgo Description and assembling procedure, Virgo internal note, VIR-0283A-10.Ħ TGG crystals characterization and FI final assembling → Assembly completed in March 2010 once the coated optics were available. Zheleznov) in January 2010 in Virgo clean rooms. Prototype assembled by our colleagues of IAP (O. → we chose to produce a 20 mm aperture with reinforced magnetic field Faraday isolator, half waveplate for compensation of Verdet constant change with temperature and DKDP crystal for thermal lensing compensation.ĥ High vacuum Faraday isolator for AdV: Magnetic system assembling. A collaboration between IAP and EGO started in July 2008 and a report on the study of different FI design with various aperture options delivered in March 2009 ( See IAP report “AdV Faraday isolator design study”, VIR-0245A-10). → in order to reach these performances, we have contacted Efim Khazanov (IAP, Russia) who already produced HP-compatible FI for LIGO. UHV compatible: residual pressure ≤10-6 mbar. Be insensitive to thermal conditions changes going from air to vacuum. The requirements for the AdV Faraday isolator (FI) are: Isolation factor > 40 dB with 250W laser power going through the FI. Input Power Control system (IPC 1) Beam pointing control system Beam analysis system (cameras, Hartmann sensor,…) In-vacuum optics: 144 m long Resonant Input Mode-Cleaner (IMC) High power Faraday isolator ITF Mode-Matching Telescope (MMT) PSL intensity stabilization photodiode Reference cavity (RFC) Steering optics Input Power Control system (IPC 2) For more information on the subsystem: AdV INJ preliminary design study, VIR-0023A-09 AdV INJ design requirements, VIR-0628A-09 - AdV baseline design, VIR-0027A-09 In-air optics: EOM system for IMC and ITF control IMC mode-matching telescope. High power compatible components: Faraday isolator for AdV High power beam dumps Electro Optical Modulator for AdV AdV Input Mode Cleaner: what to do to upgrade Virgo IMC for AdV. Outline Advanced INJ subsystem: overview. Paoletti LIGO-G VIR-0515A-10Ģ Advanced INJ subsystem: overview. Genin for AdV INJ team European Gravitational Observatory with the contribution of B. Genin for AdV INJ team European Gravitational."- Presentation transcript:ġ Advanced Virgo INJ: Faraday isolator, Electro-optical modulator, high power beam dump and Input mode-cleaner E. (License No.Presentation on theme: "Advanced Virgo INJ: Faraday isolator, Electro-optical modulator, high power beam dump and Input mode-cleaner E. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. 16-19, May 2022.Īll rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. This value is ~1/4 that with the circuit using a conventional mirror (~0.45 dB).Īutomatic gain-control / Semiconductor optical amplifier / Polarization-independent / / / / / The polarization dependence of the gain is ~0.12 dB with the circuit using an FRM. It was clarified that the polarization dependence of the gain is decreased with the double-pass type AGC circuit using a circulator and a Faraday rotator mirror. In this paper, the gain control characteristics of a polarization independent configuration of all-optical FF-AGC circuit using a semiconductor optical amplifier are experimentally studied. Kokoro Kitamura ( Shimane Univ.) OFT2022-4Īn all-optical feedforward automatic gain control scheme is applicable to a multicore erbium-doped amplifier. Gain Control Characteristics of a Polarization-Independent Configuration Using a Circulator and a Faraday Rotator Mirror in All-Optical Feedforward Automatic Gain Control Scheme Ken-system: Gain Control Characteristics of a Polarization-Independent Configuration Using a Circulator and a Faraday Rotator Mirror in All-Optical Feedforward Automatic Gain Control Scheme IEICE Technical Committee Submission System
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