Method for designing arbitrary duty ratio unequal band width optical interleaver
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A design method and technology of multiplexers, applied in wavelength division multiplexing systems, coupling of optical waveguides, etc., to achieve the effects of high bandwidth utilization, simple calculation, and high isolation
Active Publication Date: 2011-01-19
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
View PDF0 Cites 1 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The spectral transmittance obtained by the prior art [1] and [2] is not good, and the narrow-mouth output spectrum is not flat, so the bandwidth utilization rate is not high
In addition, when the number of mirrors constituting the GTE is large, due to the large number of loop variables, the calculation of the structural parameters is relatively large
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0046] A preferred embodiment of the unequal bandwidth optical interleave multiplexer is described in detail as follows in conjunction with the accompanying drawings: here select the attached figure 1 In m=2, n=2, that is, take three mirrors for GTE1 and three mirrors for GTE2 to illustrate a 25GHz, unequal bandwidth optical interleaver with isolation 0 1 and r 0 2 For the specific design of the total mirror). Step by design:
[0047] Step 1: Calculate the expression of the transfer function of the output port according to formula (2)(3)(4):
[0048] E O 1 = 1 2 [ - r 2 1 - r 1 1 z - p ...
Embodiment 2
[0057] A preferred embodiment of the arbitrary duty ratio optical interleaver is described as follows: Here, an arbitrary duty ratio optical interleaver of designing a 3rd order 25GHz, isolation <-30dB is described, and the duty ratio is optional three kinds , namely 1:3, 1:4, 1:5. By design method:
[0058] Step 1: Let q=0, then the arm length difference is 0.
[0059] Step 2: Since 3=2+1, the two GT cavities in the 3-stage optical interleaver structure are respectively composed of 2+1=3 and 1+1=2 mirrors cascaded.
[0060] The third step: select two GT cavities with the same cavity length, both of which are d=C / (2·Δf)=3mm;
[0061] Step Four: Order Attachment figure 1 Where m=2, n=1, the expression for calculating the transfer function of the structured light interleaver is:
[0062] E O 1 = 1 2 [ - r ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention relates to a method for designing an arbitrary duty ratio Michelson Gires-Touruois interferometer type unequal bandwidth optical interleaver. The method simplifies complicated transmissiThe invention relates to a method for designing an arbitrary duty ratio Michelson Gires-Touruois interferometer type unequal bandwidth optical interleaver. The method simplifies complicated transmissig a plurality of reflectors, and has wide application prospect in special wave filter, gain equalization and other fields.vantages for the situation of cascading a plurality of reflectors, and has wide application prospect in special wave filter, gain equalization and other fields.advantages for the situation of cascadinh utilization, high isolation, and the like for two paths of output spectrums. Particularly, the design method does not require programming for calculation, has simple calculation, represents betteradth utilization, high isolation, and the like for two paths of output spectrums. Particularly, the design method does not require programming for calculation, has simple calculation, represents betterteaver into sum and difference of two all-pass filters with adjacent exponent numbers. The unequal bandwidth optical interleaver designed by the method has the characters of high flatness, high bandwideaver into sum and difference of two all-pass filters with adjacent exponent numbers. The unequal bandwidth optical interleaver designed by the method has the characters of high flatness, high bandwidon of a multi-mirror GT cavity and the expression of a light wave electric vector in a reflection direction through z transform in a digital signal processing, calculates the expressions of transmission of a multi-mirror GT cavity and the expression of a light wave electric vector in a reflection direction through z transform in a digital signal processing, calculates the expressions of transmission functions of two paths of output ports of the optical interleaver on the basis, and obtains the cavity length and the arm length difference of the GT cavity, and the reflectivity of each mirror suron functions of two paths of output ports of the optical interleaver on the basis, and obtains the cavity length and the arm length difference of the GT cavity, and the reflectivity of each mirror surface of the GT cavity with design principle of an elliptic filter by a limit point value of a transfer function. Particularly, an even-order Michelson Gires-Tournois interferometer type optical interlface of the GT cavity with design principle of an elliptic filter by a limit point value of a transfer function. Particularly, an even-order Michelson Gires-Tournois interferometer type optical interleaver with definite exponent number can be designed to realize the arbitrary duty ratio optical interleaver throughby respectively decomposing two paths of transmission functions of the optical interleaver with definite exponent number can be designed to realize the arbitrary duty ratio optical interleaver throughby respectively decomposing two paths of transmission functions of the optical interl
Description
Technical field: [0001] The invention relates to a design method of a Michelson Gires-Tournois interferometer type optical interleaver with unequal bandwidth, in particular provides a design method for an optical interleaver generating square waves with arbitrary duty ratio spectral transmittance. Background technique: [0002] With the rapid development of dense wavelength division multiplexing technology, the signal frequency interval is getting smaller and smaller, and wavelength division multiplexing devices with narrower frequency intervals are required to expand capacity, while the original multiplexer / demultiplexer with mature technology , For example, the dielectric film filter is difficult to continue to use for channel signals with frequency intervals of 50 GHz and smaller. The optical interleaver can separate a group of wavelength division multiplexing signals into a group of two channels of odd series and even series with multiplied signal spacing, which reduces...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more