Tosoh Corporation

National Institute for Research in Inorganic Materials

Nobuhiro Kodama

Kazuyuki Hirao

Shigeyuki Kimura

Shinichi Hara

Seiji Oda

Yasuto Miyazawa

Hiroaki Toshima

Yoshifumi Ueda

Kouichi Koudu

Yuka Inoue

Shin-ichi Hanita

A disordered fluorite-type photochemical hole burning crystal contains Sm.sup.2+ as active ions, and a composition except Sm.sup.2+ is represented by a general formula .alpha.-(MALn)F.sub.6-v X.sub.v where 0.ltoreq.v.ltoreq.1, and M is an element selected from Ca, Sr and Ba, A is an element selected from Na, K, Rb and Cs, Ln is an element selected from Y, La, Gd and Ce, and X is an element selected from Cl, Br and I. Stable hole burning occurs at the room temperature to create narrow holes. The crystal can be used as a superior optical recording material for a room temperature operation.

Disordered fluorite-type photochemical hole burning crystal containing

An all-solid-state tunable pulse laser using a titanium-doped sapphire single crystal in which a pumping source is a pulse beam, which is produced by doubling with a KTiOPO.sub.4 under a 90.degree. phase matching condition a Q-switching laser pulse of a light beam, which is produced by a transition of .sup.4 F.sub.3/2 .fwdarw..sup.4 I.sub.11/2 in a neodymium-doped yttrium aluminum perovskite crystal pumped with a quasi-continuous diode laser.

Total-solidification type tunable pulse laser

Solid laser generator

A gadolinium-lutetium-gallium garnet crystal having the formula:

Gadolinium-lutetium-gallium garnet crystal, process for its production

In a laser-operated detecting device, the light source of a laser beam applied to a specimen under test is a tunable laser whose wavelength can be continuously tuned in a certain range. The detecting device is realized as a high speed liquid chromatography fluorescence detector, a high speed liquid chromatography Raman detector, a laser Raman spectroscopic measuring device, a coherent anti-Stokes Raman measuring device, or a microscopic Raman measuring device.

Laser-operated detector

Growing community of inventors

Kanagawa, Japan

Nobuhiro Kodama