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A reflective light modulation device and method

An optical modulation device and reflective technology, which is applied in the field of optical communication, can solve the problems of performance being greatly affected by temperature, low yield rate, complex process, etc., and achieve the effect of reducing size and connection complexity, and facilitating integration

Inactive Publication Date: 2019-07-02
ZHONGXING PHOTONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Existing colorless reflective ONUs include reflective electroabsorption modulator (Reflective ElectroAbsorption Modulator, REAM), reflective semiconductor optical amplifier (Reflective Semiconductor Optical Amplifier, RSOA), etc., among them, the optical emission device based on RSOA is regarded as the most A solution with commercial practical value, but its shortcomings are also significant, mainly including: (1) performance is greatly affected by temperature; (2) bandwidth is usually less than 2.5 gigabits per second (Gbps); (3) using III-V Materials, complex process, low yield

Method used

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  • A reflective light modulation device and method
  • A reflective light modulation device and method
  • A reflective light modulation device and method

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Embodiment 1

[0053] image 3 It is a schematic diagram of the MZM structure of the present invention based on single-arm modulation double mirrors. Wherein, 310 is a reflective optical modulation device, 31 is an interface of a reflective optical modulation device, 32 is a 3dB beam splitter / coupler, 33 is an optical branch O1, 34 is a reflector R1 of the O1 branch of the MZM, and 35 is Optical branch O2, 36 is a phase shifter, 37 is an electrode loaded with a modulation voltage signal, 38 is a mirror R2 of the O2 branch of the MZM, and 39 is a signal to be modulated.

[0054] The reflective light modulation device works as follows:

[0055] The seed light is input by the interface 31 of the reflective light modulation device, and enters the O1 optical branch 33 and the O2 optical branch 35 respectively through the 3dB beam splitter 32, and the light in the O2 branch 35 passes through the phase shifter 36 and the modulation area 37 The light in the O1 branch 33 is reflected by the R1 refl...

Embodiment 2

[0066] Figure 4 It is a schematic diagram of the structure of the MZM based on the differentially modulated double mirrors of the present invention. Wherein, 411 is a reflective light modulation device, 41 is an interface of a reflective light modulation device, 42 is a 3dB beam splitter / coupler, 43 is an O1 branch, 44 and 48 are electrodes for loading modulation voltage signals, 45 and 49 are mirror R1 and mirror R2, 46 is an O2 branch, 47 is a phase shifter, and 410 is a signal to be modulated.

[0067] The reflective light modulation device works as follows:

[0068] The light is input from the interface 41, and is respectively coupled into the O1 branch 43 and the O2 branch 46 through the 3dB beam splitter 42, wherein, the light of the O1 branch passes through the modulation area 44 and the R1 reflector 45, and then returns to the 3dB coupler 42 in the original path; After the light of the branch passes through the phase shifter 47—modulation area 48——R2 reflector 49—mo...

Embodiment 3

[0071] Figure 5 It is a schematic diagram of the MZM structure based on the single-arm modulation single mirror of the present invention. Among them, 59 is a reflective optical modulation device, 51 is an interface of a reflective optical modulation device, 52 is a 3dB beam splitter / coupler, 53 is an O1 branch, 54 is an O2 branch, 55 is a phase shifter, and 56 is The electrode loaded with the modulation voltage signal, 57 is a reflector, and 58 is a signal to be modulated.

[0072] The working mode of the reflective light modulation device is similar to that of the preferred embodiment 1, except for the difference that the two branches share a mirror.

[0073] It should be noted that the reflective optical modulation devices in preferred embodiment 1, preferred embodiment 2, and preferred embodiment 3 can use silicon-based materials, or can be replaced by materials such as indium phosphide (InP) to realize high-speed modulation devices. Function. Compared with the common h...

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Abstract

The invention discloses a reflective light modulation device and method, the reflective light modulation device comprises a modulation device interface, a modulation unit and a reflection unit, wherein the modulation device interface is used for inputting an incident light signal and outputting a modulated light signal; the modulation unit is used for modulating the incident light signal by adopting a Mach-Zehnder interference structure; and the reflection unit is used for reflecting the modulated optical signal back to the modulation device interface. According to the invention, the Mach-Zehnder interference structure is adopted to modulate the incident light signal, the modulated optical signals are reflected to the modulation device interface, and the size and the connection complexityof an optical emission system are reduced, the integration is convenient, and a reflective Mach-Zehnder high-speed optical modulation device (Reflexed Mach-Zehnder Modulator, R-MZM) is realized. In addition, the excellent performances such as modulation bandwidth and extinction ratio of the Mach-Zehnder modulator are kept, and the Mach-Zehnder modulator can be manufactured by adopting an advancedCMOS process, so that the cost of a light emission system is reduced.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a reflective light modulation device and method. Background technique [0002] With the development of computer and communication technology, the demand for information in modern society is increasing exponentially. Optical fiber access network (Fiber To The X, FTTX) technology is a mainstream technology driving the construction of optical access infrastructure, and in the construction of FTTX network, a very critical factor is the optical network unit ( Optical Network Unit, ONU), the ONU plays a key role in the consumption of the entire access network. A requirement of cheap ONUs is that they should be indistinguishable at each user end, which is of great significance to the mass production, operation, management and maintenance of ONUs. [0003] Considering the huge application prospects and characteristics of the Wavelength Division Multiplexing (WDM) ...

Claims

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Application Information

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IPC IPC(8): H04B10/516H04B10/50
CPCH04B10/505H04B10/516
Inventor 张森林张琦陆建鑫
Owner ZHONGXING PHOTONICS TECH CO LTD
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