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Optical polarization beam combiner/splitter

一种光束组合、光束分束的技术，应用在光学、偏振元件、光学元件等方向，能够解决工作波长范围窄、插入损耗增大、很难相匹配等问题，达到优异性能特性、减少插入损耗、提高制造成品率的效果

Inactive Publication Date: 2007-06-06
API TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fused fiber waveguides provide the lowest overall insertion loss, but in most designs the two channels have different insertion losses, making it difficult to match
Another significant disadvantage of fused fiber waveguide polarization beam combiners is their extremely narrow operating wavelength range
Typically, this range is in the nanometer range, and increasing the bandwidth of the device will result in a concomitant increase in insertion loss

Method used

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  • Optical polarization beam combiner/splitter
  • Optical polarization beam combiner/splitter
  • Optical polarization beam combiner/splitter

Examples

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Embodiment Construction

[0038] The following detailed description of the invention is by way of illustration only and should not be construed as limiting the invention to these examples.

[0039] FIG. 4 shows a perspective view of an optical PBC / S device 100 according to an embodiment of the present invention. The optical PBC / S device of the present invention can be equally used as a polarization beam combiner and a polarization beam splitter. This article will firstly describe the beam combination working mode of the optical PBC / S device 100 . The device 100 includes a thin film grid polarizer 150 disposed between a pair of collimating / focusing lenses 110 and 120 . In this example, the film grid polarizer 150 is shown to include a film grid structure 153 overlying a base material 158 .

[0040] The collimating / focusing lenses 110 and 120 can use graded index lenses. The collimating / focusing lenses 110 and 120 are arranged in a coaxial configuration such that their optical axes are aligned, thereb...

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Abstract

An optical device (100) for combining two orthogonally polarized beams (162, 164) or splitting a beam (166) into two orthogonally polarized beams (162, 164) is provided that utilizes two collimating / focusing lenses (110, 120) and a thin film wire-grid polarizer (150). Because the thin film wire-grid polarizer can be fabricated in very thin profile, the provision of a thin film wire-grid polarizer allows the optical polarization beam combiner / splitter device to be highly integrated and simultaneously realize a number of performance advantages of a thin film wire-grid polarizer over other types of polarizers utilized in various prior art polarization beam combiner / splitters.

Description

technical field [0001] The present invention relates generally to optical polarizing beam combiners / beam splitters, and more particularly to packaged fiber optic polarizing beam combiners / beam splitters utilizing a thin film grid polarizer. Background technique [0002] Optical polarization beam combiners / splitters are used in many optical communications applications, including those requiring amplification of optical signals, better distribution of polarization states, or a combination of the two, or separation of beam polarization. [0003] Figures 1a and 1b show an example of a prior art polarizing beam combiner / beam splitter ("PBC / S") arrangement utilizing a polarizing beam splitter cube 7 . In the polarizing beam splitter shown in Fig. 1a, an incident light beam enters from a first light source (such as the optical fiber 1 on the left side of the figure). After being collimated by a first collimating / focusing lens 4 , the incident beam from the first optical fiber 1 en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/27G02B5/30G02B6/34
CPCG02B6/272G02B5/3058G02B6/2773G02B6/2937
Inventor 安格·尼科洛夫斯蒂芬·Y·周
Owner API TECH