Optical device and its making method

An optical device and optical technology, applied in the direction of optics, optical components, light guides, etc., can solve the problem of increased transmission loss

Inactive Publication Date: 2003-04-30
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, signal light is refracted in the gap, and transmission loss may be greatly increased

Method used

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  • Optical device and its making method
  • Optical device and its making method
  • Optical device and its making method

Examples

Experimental program
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Effect test

example 1

[0158] First, see Figure 1A and 1B , a first example of an optical device according to the present invention will be described. Figure 1A is a perspective view showing the uppermost part of a first example of an optical device (light receiving module) of this example, Figure 1B is a cross-sectional view of the optical device taken along an optical fiber.

[0159] The optical device is to use a glass substrate 1 (thickness 2 mm; 5 mm long and 3 mm wide) with a V-groove (first groove) 3 formed on a flat upper surface of the substrate 1 with a diameter of about 130 μm. depth. An optical fiber 2 having an outer diameter of 125 μm is placed in the V-groove 3, and a parallel groove (second groove) 4 is formed on the upper surface of the glass substrate 1 so as to cross the optical fiber 2 diagonally. (relative to its optical axis). Due to the parallel groove 4 a gap is formed diagonally in the optical fiber 2 so that the optical fiber 2 is separated into two parts spatially ...

example 2

[0189] Next, see Figure 5 , a second example of the light receiving device according to the present invention will be described. Figure 5 is a cross-sectional view of a light-receiving optical device for receiving signal light with a wavelength λ1 of 1.55 μm and an optical signal with a wavelength λ2 of 1.31 μm. In the following description, the same elements as those in the previous examples are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

[0190] Such as Figure 5 As described in , two parallel grooves (groove width: about 100 μm) were formed in the glass substrate 1 to form a predetermined angle with respect to the optical axis of the optical fiber 2 . In this example, the angles formed by the parallel grooves and the optical axis are equal. However, they can be different from each other.

[0191] As shown in Example 1, the optical fiber 2 is fixed with resin in a groove formed on the upper surface of the glass substrate 1 . ...

example 3

[0205] Next, see Figure 7A , 7B and 8, describe a third example of a device of the present invention.

[0206] In the device of this example, a hybrid integrated on a substrate such as Figure 5 A photodetector and an electrical amplifier that receive an optical signal with two wavelengths are shown in . Figure 7A It is an equivalent circuit representing a part of the circuit of the device of this example; FIG. 7B is a schematic perspective view thereof; Figure 7C for its plan view.

[0207] As shown in Figure 7B, on the substrate 1 is formed as Figure 5 The photodetectors 13 and 14 are shown in . As described in Example 2, the photodetectors 13 and 14 respectively detect signal light in a selected wavelength band among the light propagating through the optical fiber 2 embedded in a groove (not shown).

[0208] The photodetector is in Figure 7A is represented by the symbol of a photodiode. When the photodetector receives signal light, the potential of a portion bet...

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Abstract

The optical device of the present invention includes a substrate, at least one first groove formed on the substrate, an optical fiber placed in the first groove, and at least one second groove diagonally formed across the optical fiber. Furthermore, the optical device includes an optical member inserted in the second groove, having a surface which reflects or diffracts at least a part of light propagating through the optical fiber. A photodetector is placed at a position where light which is reflected or diffracted by the optical member is received. As a result, an miniaturized optical device having a low loss and high reliability can be provided at low cost.

Description

technical field [0001] The present invention relates to an optical device connected to an optical fiber transmission line, capable of receiving or transmitting / receiving an optical signal, and a method for manufacturing the optical device. Background technique [0002] Wavelength Division Multiplexing (WDM) can increase the transmission capacity of an optical transmission system. It also realizes two-way transmission and simultaneous transmission of different kinds of signals. In this way, the WDM can flexibly meet service requirements in an optical transmission system, and can be applied to various optical transmission systems, such as delayed transmission systems, subscriber systems, and local network transmission systems. [0003] In recent years, in particular, an optical subscriber system for transmitting multi-channel video information and data from a central station to a plurality of homes through an optical fiber has been proposed and studied. These systems require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/34G02B6/42
CPCG02B6/4246G02B6/4214G02B6/12007H01L2224/73204H01L2224/16225G02B2006/12109H01L2224/32225G02B6/421H01L2924/00014H01L2924/00H01L2224/0401
Inventor 宇野智昭雄谷顺东门元二光田昌弘
Owner PANASONIC CORP
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