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Tunable laser, optical network device and optical network system

A laser and modulation technology, which is applied to lasers, laser parts, semiconductor lasers, etc., can solve the problems of complex manufacturing process, inability to modulate resonant cavity, and high cost of adjustable lasers, and achieve easy promotion and use, low production cost, and high-quality products high rate effect

Inactive Publication Date: 2012-10-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tunable laser based on the coupled cavity uses the mode of the Fabry-Perot cavity itself for wavelength selection, and cannot directly modulate the resonant cavity. It is necessary to add an additional costly external modulator to realize signal modulation and emission functions. As a result, the manufacturing process of the tunable laser coupled cavity is complicated and the cost is high

Method used

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  • Tunable laser, optical network device and optical network system
  • Tunable laser, optical network device and optical network system
  • Tunable laser, optical network device and optical network system

Examples

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Embodiment 1

[0041] An embodiment of the present invention provides a tunable laser, which is a low-cost laser with a direct modulation function and a wide-range tunable wavelength.

[0042] Such as figure 1 As shown, the tunable laser includes:

[0043] A coupling cavity 1 and a modulation area 2, the coupling cavity 1 is provided with three output ends, and the opposite end of at least one output end of the coupling cavity 1 is a modulation area 2, figure 1 In the three output ports of the coupling cavity 1, the modulation area 2 is set end-to-end, but in fact, since the physical characteristics such as the frequency of the outgoing light at the three output ends of the coupling cavity 1 are the same, it only needs to be coupled according to the actual situation. The opposite end of one of the three output ends of the cavity 1 is provided with a modulation area 2 .

[0044] The end face of any output end of the coupling cavity 1 is opposite to the end face of the modulation area 2, and...

Embodiment 2

[0068] The embodiment of the present invention provides another tunable laser, the basic principle of which is basically the same as the first embodiment, the only difference is that the coupling cavity is arranged in parallel with two resonant cavities, and a "Y" shape is formed through a section of overlapping waveguides. . Such as Figure 11 As shown, the coupling cavity 1 includes a first optical tuning cavity 10 and a second optical tuning cavity 11, the first end 10a of the first optical cavity 10 is connected to the first end 11a of the second optical cavity 11 They are close to each other and overlap to form a coupling area, and the first optical resonant cavity 10 and the second optical resonant cavity 11 are arranged side by side in a "Y" shape.

[0069] The same principle, in the embodiment of the present invention, when the adjustable laser is working, the constant current injected by the electrode 102 and the electrode 112 generates laser light in the first gain ...

Embodiment 3

[0072] An embodiment of the present invention provides an optical network system, such as Figure 13 As shown, the optical network system 200 includes: an optical line terminal 202, an optical distribution network 206, and at least one optical network unit 208, and the optical line terminal 202 communicates with the at least one optical network unit 208 through the optical distribution network 206 connected, the OLT 202 and / or ONU 208 includes a tunable laser 204 .

[0073] Among them, such as figure 1 As shown, the tunable laser 204 includes: a coupling cavity 1 and a modulation area 2, the coupling cavity 1 is provided with three output ends, the opposite end of at least one output end of the coupling cavity 1 is the modulation area 2, figure 1 In the three output ports of the coupling cavity 1, the modulation area 2 is set end-to-end, but in fact, since the physical characteristics such as the frequency of the outgoing light at the three output ends of the coupling cavity ...

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Abstract

The invention discloses a tunable laser, an optical network device and an optical network system, and relates to the technical field of fiber optical communication. The tunable laser having a direct modulation function is low in cost without adding an expensive external modulator, and wavelengths can be tuned in a wide range. The tunable laser comprises: a coupled cavity and a modulation area. The coupled cavity is provided with three output ends, at least an output end's opposite end of the coupled cavity is the modulation area, any output end's end face of the coupled cavity is opposite to the end face of the modulation area, and the output end's end face and the end face of the modulation area forms an acute angle. The coupled cavity is used to generate specific frequency optical signals and send the optical signals to the modulation area. The modulation area is used to adjust strength of the specific frequency optical signals sent by the coupled cavity. The tunable laser is used in single module tunable laser.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an adjustable laser, optical network equipment and an optical network system. Background technique [0002] Today, most modern telecommunications systems use fiber optic communications. Optical fiber network provides unprecedented large capacity and installation flexibility, which can support the continuous development of various broadband applications. Tunable lasers can help maximize the use of existing fiber optic network resources. By dynamically provisioning bandwidth, traffic can be shifted from congested channels to unused channels to meet the needs of the Internet. Tunable lasers are also an important prerequisite for the realization of fully interoperable fiber-optic networks, allowing fast and simple establishment or change of optical paths. Tunable lasers, especially those with small size, large tuning range and high power output, have a wide ran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10H01S5/062H04B10/12
CPCH01S5/1007H01S5/06H01S5/0602H01S5/4068H01S5/1085
Inventor 刘德坤徐之光周小平
Owner HUAWEI TECH CO LTD