公开(公告)号：US4946245A

公开(公告)日：1990-08-07

申请号：US358331

申请日：1989-05-17

Applicant: Giles R. Chamberlin ,  David B. Payne ,  David J. McCartney

Inventor： Giles R. Chamberlin ,  David B. Payne ,  David J. McCartney

IPC: G02B6/00 ,  G02B6/02 ,  G02B6/293 ,  G02B6/34 ,  G02F1/01

CPC classification number: G02B6/4246 ,  G02B6/02085 ,  G02B6/29311 ,  G02B6/29323 ,  G02F1/011 ,  G02F1/0115 ,  G02F2201/302 ,  G02F2203/055

Abstract: An optical filter includes a volume diffraction grating provided within a waveguide. The grating has a thickness T sufficient such that when an optical beam R is incident on the grating from outside the waveguide, wavelengths at or near the Bragg wavelength for the grating are diffracted and coupled into the waveguide, all but the first order interferences being substantially eliminated, while wavelengths away from the Bragg wavelength pass through the waveguide substantially undiffracted. The grating pitch L may be varied to permit tuning of the filter response.

公开(公告)号：US4452506A

公开(公告)日：1984-06-05

申请号：US211049

申请日：1980-11-28

Applicant: Michael H. Reeve ,  Colin A. Millar ,  David B. Payne

Inventor： Michael H. Reeve ,  Colin A. Millar ,  David B. Payne

IPC: G02B6/24 ,  G02B6/38 ,  G02B7/26

CPC classification number: G02B6/3803 ,  Y10S359/90

Abstract: A pair of optical fibres which are to be joined are located with their end portions in coupling elements one of which is transparent to light. The coupling elements are located such that the ends of the fibres are in approximate alignment. Light is transmitted along one fibre so that it is received by the fibre in the transparent coupling element. Light which is not coupled into the core of the fibre is sensed by a sensor and the relative position of the fibres is adjusted until the level of sensed light is a minimum. The sensing of the light is carried out at positions spaced angularly about the waveguide so that an indication of the direction of any misalignment is obtained. The coupling elements are then secured in this position. The adjustment of the fibres can be carried out using a linear translation stage and a microprocessor which controls the stage in accordance with signals from the sensor.

Abstract translation: 要被接合的一对光纤的端部位于耦合元件中，其中一个光对光是透明的。 耦合元件被定位成使得纤维的端部大致对准。 光沿着一根光纤传播，使得它被透明耦合元件中的光纤接收。 未耦合到光纤的芯中的光由传感器感测，并且调节光纤的相对位置直到感测光的电平为最小。 光的感测在与波导相对角度地间隔的位置处进行，从而获得任何未对准的方向的指示。 然后将耦合元件固定在该位置。 可以使用线性平移台和微处理器来执行光纤的调节，微处理器根据来自传感器的信号控制该级。