公开(公告)号：DE2652870A1

公开(公告)日：1977-07-14

申请号：DE2652870

申请日：1976-11-20

Applicant: IBM

Inventor： COMERFORD LIAM DAVID ,  ZORY PETER STEPHEN

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/12 ,  H01S5/40 ,  H01S3/19

Abstract: An array of collimated wise aperture electrically pumped leaky corrugated AlGaAs optical waveguide lasers is formed on a single chip by etching a series of grooves oriented with respect to the crystalographic planes to isolate discrete lasers in the array and provide the requisite orientation of the internal reflecting surfaces to support the lasing action. The corrugation period is chosen such that the laser radiation exits from the array in a direction normal to the plane of waveguide.

公开(公告)号：DE2459762A1

公开(公告)日：1975-07-17

申请号：DE2459762

申请日：1974-12-18

Applicant: IBM

Inventor： HEIDRICH PAUL FREDERICK ,  ZORY PETER STEPHEN

IPC: G02B6/34 ,  G02B6/124 ,  G02F1/295 ,  H01S3/02 ,  H01S3/063 ,  H01S3/101 ,  H01S3/20 ,  G02F1/29 ,  H01S3/08

Abstract: Diffracted leaky optical waves are coupled out of a thin film optical waveguide device having one surface which is periodically thickness-modulated or corrugated to form an optical diffraction grating. The waveguide device is constructed such that the average thickness of the waveguide in the complex refractive index of the waveguide or one of the layers surrounding the waveguide is varied when an external power source applied to the device is varied and thereby, a parameter of the leaky wave in accordance with the variable power source. In one embodiment, the waveguide is made of light amplifying material which is suitably excited to produce lasing action and cause an optical wave to propagate in the waveguide. The variable parameter in this case is the wavelength of the leaky wave, and the leaky wave is always normal to the plane of the diffraction grating. Consequently, a tunable laser is provided. In a second embodiment, no lasing occurs, but instead, an external light source is used to cause an optical wave to propagate in the waveguide. The parameter which is varied is the angle between the leaky wave and the normal to the diffraction grating, the wavelength of the leaky wave remaining constant.