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    2.
    发明专利
    未知

    公开(公告)号：DE1125482B

    公开(公告)日：1962-03-15

    申请号：DEJ0018524

    申请日：1960-08-04

    Applicant: IBM

    Inventor： SOROKIN PETER PITIRIMOVICH

    IPC: G11C11/16

    Abstract: 882,164. Electrical digital data-storage apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. Aug. 2, 1960 [Aug. 25, 1959], No. 26706/60. Class 106 (1). In an electron spin echo storage system the echo pulse is detected by its effect on a beam of polarized light. The sample 3 is subjected to a magnetic field H o while located in a microwave resonant cavity and an information pulse is applied through port 2 in the cavity. A light beam polarized in the direction of arrow 9 is directed through ports 4 and the sample 3. The occurrence of an echo pulse results in rotations of the plane of polarization of the light which are passed by a filter 7 arranged to reject light polarized in the direction 9, and the resultant light pulse strikes a photo-multiplier 8,

    5.
    发明专利
    未知

    公开(公告)号：DE1278037B

    公开(公告)日：1968-09-19

    申请号：DEJ0024771

    申请日：1963-11-22

    Applicant: IBM

    Inventor： DILL FREDERICK HAYES ,  RUTZ RICHARD FREDERICK ,  SOROKIN PETER PITIRIMOVICH

    IPC: H01S5/10 ,  H01S5/32

    Abstract: 995,715. Lasers. INTERNATIONAL BUSINESS MACHINES CORPORATION. Nov. 18, 1963 [Nov. 30, 1962], No. 45355/63. Heading H3B. [Also in Division H1] An injection laser has an action region with a cross - sectional shape perpendicular to its smallest dimension, in the form of a regular polygon, all the side faces being optically flat. A cross - section of a rectangular parallelepipedal GaAs crystal, having electrodes at each end and a PN junction in the middle, is shown in Fig. 2. Rays following paths 21, 21a, 21b, meeting crystal surfaces 22, 24, 26 and 28 at 45 degrees are totally reflected. The crystal provides a high Q for such rays and these modes are preferentially established. Once established such modes are maintained at the expense of other modes. The crystal may be surrounded by a material having a refractive index between that of the crystal and air, to modify the internal reflection properties. Other crosssectional geometries shown are triangular and hexagonal. In the latter case (Fig. 5) three modes 46, 48, 50 are possible. Modes 48, 50 may be suppressed by using a material of sufficiently low refractive index, or mode 46 may be suppressed by notching crystal 44 at its vertices. Modes 48 and 50 are optically independent. Light may be coupled out of a crystal by means of a suitably shaped body (Fig. 4, not shown) of refractive index close to that of the crystal, placed within one wavelength of the crystal. The rays may be concentrated into a single beam. Alternatively a protuberance or groove may be provided at a crystal surface for extracting the radiation. The ratio of the refractive index of the crystal to that of the surrounding medium, for optimum mode selection, should be where N is the number of sides of the polygon formed by the cross-section.

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