公开(公告)号：US3610945A

公开(公告)日：1971-10-05

申请号：US3610945D

申请日：1970-01-07

Applicant: BELL TELEPHONE LABOR INC

Inventor： BOYD GARY D ,  KURTZ STEWART K ,  NASSAU KURT

IPC: G02F1/39 ,  H03F7/04

CPC classification number: G02F1/39

Abstract: A backward-wave parametric oscillator is disclosed in which the active medium is an antimony sulfur iodide (SbSI) single crystal of high resistivity. The crystal is cut into a cubical shape with faces normal to its principal crystalline axes. Preferably, a collinear phase match of two near-infrared forward waves and one backward wave is obtained in the Y-crystalline axis direction, which is a principal axis direction. A strong nonlinear effect is obtained without double refraction. A technique is disclosed for growing SbSI crystals in a special configuration imposing a liquid surface in the path of growth, to circumvent the needleforming growth-rate anisotropy.

公开(公告)号：US3446603A

公开(公告)日：1969-05-27

申请号：US3446603D

申请日：1965-07-12

Applicant: BELL TELEPHONE LABOR INC

Inventor： LOIACONO GABRIEL M ,  NASSAU KURT

IPC: C01G33/00 ,  C30B15/00 ,  C01D11/02

CPC classification number: C01G33/00 ,  C01P2006/60 ,  C30B15/00 ,  C30B29/30 ,  Y10S117/902

Abstract: 1,148,080. Lithium niobate. WESTERN ELECTRIC CO. Inc. 7 July, 1966 [12 July, 1965], No. 30534/66. Heading C1A. [Also in Division B1] Lithium niobate crystals are grown from a melt containing, in addition to the lithium and niobium, from 0À1 to 5 atom per cent based on niobium of molybdenum or tungsten and a seed crystal is used and oriented so that the growth proceeds in a direction forming an angle between 18 and 41 degrees with the polar 'c' axis and the growth occurs on the negative end of the crystal. Preferably the crystal is grown by dipping the seed crystal in the melt and subsequently withdrawing it, and the crystal may be rotated during withdrawal. The lithium/niobium atomic ratio is preferably with Œ5% of unity. The crystals obtained may be annealed by heating in oxygen.

公开(公告)号：US3565577A

公开(公告)日：1971-02-23

申请号：US3565577D

申请日：1968-03-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： PULUKA JOHN F ,  SHIEVER JOHN W ,  NASSAU KURT

IPC: C30B11/00 ,  C01G33/00

CPC classification number: C30B11/00 ,  C30B29/30

Abstract: SINGLE CRYSTALS OF KNB3O8 HAVE OBTAINED FROM A MELT CONTAINING AN EXCESS OF K2O OVER THE STOICHIOMETRIC AMOUNT. SUCH CRYSTALS EXHIBITS EXCELLENT CLEAVAGE, FLEXIBILITY, AND DIELECTRIC PROPERTIES WHICH ENABLE THEIR USE IN HIGH FREQUENCY, HIGH VOLTAGE, HIGH CAPACITANCE APPLICATIONS. SUCH CRYSTALS ARE ALSO TRANSPARENT TO ELECTROMAGNETIC RAIDATION WITHIN THE VISIBLE AND PORTIONS OF THE ULTRAVIOLET AND INFRARED SPECTRUMS, AND EXHIBIT A HIGH REFRACTIVE INDEX ENABLING THEIR USE AS LIGHT GUIDES.