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Optical delay

A technology of optical delay and light beam, which is applied in the field of optics and can solve the problems that delay lines cannot be used

Active Publication Date: 2010-05-26
月神创新股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, these types of delay lines generally cannot be employed in high-speed systems that also require long delay times

Method used

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Embodiment Construction

[0023] now refer to Figure 1a and 1b , an optical delay line arrangement utilizing the principles of the present invention is shown therein and generally designated 10 . Although the optical delay line device is shown in conjunction with a free-space optical circulator 12, the optical delay line device 10 is suitable for use in any type of optical system that requires the use of an optical retarder.

[0024] As its main components, the optical delay device 10 comprises a rotating wheel 14 mounted on a plate 16 and a set of prisms such as corner cube prisms 18 . A prism 18 is mounted around a slot 20 in the wheel 14 at a fixed radius from the center of the wheel, such as with a UV curable adhesive, and is oriented to receive / retroreflect a beam of light, such as that produced by a laser, that is Approach the wheel in the plane.

[0025] Also refer to Figure 1c , the optical circulator 12 includes an input port 19 coupled to an input fiber 22, an output port 23 coupled to ...

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Abstract

An optical delay line device includes a rotatable wheel and one or more prisms mounted about the circumference of the wheel. The one are more prisms are positioned to retroreflect the optical beam that passes approximately tangent to the wheel to cause a delay or phase shift to the beam as the wheel rotates.

Description

[0001] related application [0002] This application claims priority to US Provisional Application No. 60 / 614,793, filed September 30, 2004, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to the field of optics. Background technique [0004] Optical delays are often used in time domain and low coherence systems. For example, some systems employ optical retarders to determine the time or phase difference relative to a reference beam, as is the case in pump-probe measurements for checking samples. This is achieved by placing a delay line in the path of one of the beams to vary the path length of that beam relative to the second beam. The beam in such experiments can consist of a series of short light pulses or a continuous wave beam, as in low-coherence measurement systems. [0005] Some delay lines utilize retroreflectors to turn the beam back in the opposite direction. Retroreflectors typically...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J9/02G02B26/12
CPCG02B26/06G01J3/0235G01J3/0205G02B5/122G01J9/02
Inventor S·威廉姆森A·A·切诺夫斯基K·H·沃尔特D·奇姆达斯
Owner 月神创新股份有限公司