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Optical circuit element and method of producing the same

A component and optical path technology, applied in the field of optical path components, optical path components and the production of the components, can solve the problems of becoming expensive, complicated processing steps, expensive cutting of multi-layer dielectric films, etc.

Inactive Publication Date: 2003-10-22
3M INNOVATIVE PROPERTIES CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Multilayer dielectric films not only require expensive raw materials but also require complex processing steps such as cutting, polishing, etc., and inevitably become expensive

Method used

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  • Optical circuit element and method of producing the same
  • Optical circuit element and method of producing the same
  • Optical circuit element and method of producing the same

Examples

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example 1

[0076] figure 2 A preferred example of a four-terminal optical circulator is shown according to the present invention. The illustrated optical circulator 10 has four ports, that is, a first optical input / output port 1, a second optical input / output port 2, a third optical input / output port 3, and a fourth optical input / output port 4. Although not shown, the light input / output port is a parallel beam system composed of aspheric lenses and optical fibers. As shown in the figure, the optical circulator is composed of the following: two polarized light separation elements 5 and 6 composed of multilayer polymer films, total reflection mirrors 7 and 8 composed of multilayer films, and a polarization plane rotation independent of the direction of light propagation An element 15 (first polarization plane rotating element), a polarization plane rotating element 16 (second polarization plane rotating element) dependent on the light propagation direction, and means for applying a magn...

example 2

[0086] Figure 7 Another preferred embodiment of a four-terminal optical circulator is shown according to the present invention. From the perspective of the arrangement and operation of the optical components, the illustrated optical circulator 10 uses a Faraday rotator composed of a magnetized garnet having a square hysteresis curve instead of the bismuth-substituted magnetized garnet (GdBiFe garnet) used in Example 1. ) is the same as the optical circulator described in Example 1 above, except that the polarization plane rotation element 25 (the first polarization plane rotation element) is independent of the light propagation direction. The magnetic garnet with a square hysteresis curve used here is the Bi-generation rare earth iron garnet Eu 0.9 Ho 1.1 Bi 1.0 Fe 4.2 Ga 0.8 0 12 , its thickness is about 0.1mm, and once it is magnetized by an external magnetic field, it can maintain a magnetization of about 350 Oersted even if no external magnetic field is applied.

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example 3

[0089] Figure 8 shows an example used as an optical switch, it refers to the figure 2 The four-terminal optical circulator of the present invention described in. In the illustrated example, a yoke 24 wound with a coil 23 and made of a semi-hard magnetic material is used as a device for applying a magnetic field, and a DC source 21 connected to the coil 23 through a switch 22 is used as a device for providing a magnetic field. current device. When the optical circulator 10 is placed in the central space of the ring yoke 24 and when the current device changes the direction of the applied current, the magnetization of the polarization plane rotating element can be reversed regardless of the propagation direction of light in the optical circulator. Therefore, the optical circulator 10 can operate as a four-terminal (2:2) optical switch. As a modified example, a 2:2 optical switch can be operated as a 1:2 optical switch. In this optical switch, placing the mechanism for drivi...

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Abstract

Provided is an optical circuit element and, particularly, an optical circulator or the like, that exhibits an excellent extinction ratio and that can be easily produced at a decreased cost. An optical circuit element comprising, in combination, two polarized light-separating elements, two totally reflecting mirrors, at least a piece of polarizing plane rotating element independent of a direction of travel of light, at least a piece of polarizing plane rotating element dependent of a direction of travel of light, a plurality of light incident / outgoing ports, and a magnetic field application means, wherein said polarized light-separating elements and said totally reflecting mirrors are formed of the same or different multi-layer polymer films.

Description

Background of the invention [0001] The invention relates to an optical circuit element and a method of producing the same. The invention more particularly relates to optical circuit elements which can be advantageously used in optical communication equipment and optical data equipment as optical passive components for rerouting optical signal paths. Typical examples of optical circuit components include optical circulators, optical switches, optical isolators, etc. [0002] In modern optical communication systems, the widespread use of fiber amplifiers is requiring more optical circuit components such as optical circulators and optical switches to rearrange the path of optical signals. In addition, in wavelength division multiplexed optical communication systems attracting attention in recent years, it is expected that a combined structure of a narrow-band optical filter and an optical circulator will be largely required. Therefore, it is believed that the optical circulator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08G02B5/30G02B6/26G02B27/28G02F1/09
CPCG02B6/2746G02F1/093G02B27/28
Inventor 本间洋桥间学高桥立夫
Owner 3M INNOVATIVE PROPERTIES CO
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