Multi-speed difference quadrature phase shift keying demodulator and control method thereof

A differential quadrature phase shift and demodulator technology, applied in the field of demodulators, can solve problems such as Q value degradation, and achieve the effects of low cost, simple process and easy mass production

Active Publication Date: 2011-01-26
GUANGXUN SCI & TECH WUHAN
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Problems solved by technology

In different network systems, the time delay τ does not corr

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  • Multi-speed difference quadrature phase shift keying demodulator and control method thereof
  • Multi-speed difference quadrature phase shift keying demodulator and control method thereof
  • Multi-speed difference quadrature phase shift keying demodulator and control method thereof

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Embodiment Construction

[0024] The multi-rate differential quadrature phase-shift keying demodulator and control method of the present invention will be described in detail below in conjunction with the embodiments and drawings.

[0025] Such as image 3 / Figure 4 As shown, the multi-rate differential quadrature phase-shift keying demodulator of the present invention includes a demodulator chip 4, and the demodulator chip 4 is made of ordinary silicon-based silicon dioxide material and planar optical waveguide technology Monolithic integrated optical PLC DQPSK demodulator chip. On the silicon substrate, thermal oxidation, lower cladding deposition, waveguide core layer deposition, photolithography, etching and upper cladding deposition, surface passivation, annealing and other processes are sequentially produced such as image 3 The waveguide structure shown.

[0026] Such as image 3 , Figure 4 Shown, be respectively provided with on demodulator chip 4: be positioned at demodulator chip 4 in...

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Abstract

The invention relates to a multi-speed difference quadrature phase shift keying demodulator and a control method thereof. The demodulator comprises more than one first equipartition coupler, second equipartition coupler and third equipartition coupler sequentially arranged on the light path of a chip of the demodulator, first directional couplers and second directional couplers corresponding to the output of each second equipartition coupler or third equipartition coupler, first metallic film heaters and first thermistors arranged on lower arms between the second equipartition couplers and the first directional couplers, second metallic film heaters and second thermistors arranged on the lower arms between the third equipartition couplers and the second directional couplers, third thermistors arranged on the chip of the demodulator, and a microprocessor connected to the chip of the demodulator. The temperature TTEC (Temperature of Thermal Electrical Cooler) of a TEC (Thermal Electrical Cooler), the temperature TI of the metallic film heater 5 and the temperature TQ of the metallic film heater 6 are respectively configured according to different signal rates when the devices utilize different signal speeds in different transmission networks, thus the invention is adaptive to the application of the different transmission rates in the different transmission networks.

Description

technical field [0001] The present invention relates to a demodulator, in particular to a multi-rate differential quadrature phase shift keying demodulator which can be used in different transmission networks to convert differential quadrature phase shift keying signals into intensity modulation signals and Control Method. Background technique [0002] In the past 10 years, the simultaneous transmission of multiple channels through the DWDM system and the increase in the symbol rate of each channel have improved the transmission capacity of the optical communication network. The single-channel rate has been continuously increased to 160Gb / s, and the channel spacing has been continuously changed to 25GHz, the transmission distance continues to extend to more than 1000km. In this case, various limiting factors affecting system performance are also increasing, mainly manifested as reduced tolerance to chromatic dispersion (CD) and polarization mode dispersion (PMD) in the syst...

Claims

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Application Information

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IPC IPC(8): H04L27/20G02B6/26
Inventor 周天宏官成钢岳玉环马卫东吴凡陈强柯滔袁晨
Owner GUANGXUN SCI & TECH WUHAN
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