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LCGT Meeting Laser & Mirror

LCGT Meeting Laser & Mirror. 12 December, 2011. Laser . Ordered fiber amplifiers made by Nufern will be shipped on 16 th December. After the amplifiers arrive at Tokyo, we will start the evaluation of their performance.

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LCGT Meeting Laser & Mirror

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  1. LCGT MeetingLaser & Mirror 12 December, 2011

  2. Laser • Ordered fiber amplifiers made by Nufern will be shipped on 16th December. • After the amplifiers arrive at Tokyo, we will start the evaluation of their performance. • A person of a company that may assemble the system will visit me on 15th December in order to discuss the laser system for LCGT.

  3. Mirror • Polish of MC mirrors have been done. • Hirose-san and Mio are visiting CSIRO to discuss the polish and coating of BS and arm mirrors of iLCGT. • Hirose-san have inquired the possibility to fabricate mirrors for a PR cavity and an SE cavity. • Ohashi-san, Hirose-san and Mio visited Canon in order to discuss the possibility to polish the mirrors. Canon is now much interested in joining this project. • Small mirror samples (1-inch) have been coated by Showa and will be done by Tokai-Kogaku; I asked to make the coating of 99.999% reflectance.

  4. Sapphire • We have started the procedure for purchasing c-axis crystals of 22-cm diameter and 15-cm thickness . • We have obtained sapphire samples from SIC; they have been sent to a Showa in order to polish and AR –coat; they will be delivered to us in the second week , coming January. • Two persons will visit us for joining the absorption measurements that will be done just after the next f2f meeting. • Small samples of sapphire (1-inchi) have been polished and are now being coated to have the reflectance of 99.99%.

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