Novel method and model for improving modulation depth of dye doped organic thin film all-optical switch

An all-optical switch and modulation depth technology, applied in the field of photonics, can solve the problem of background signal reduction and other issues

Inactive Publication Date: 2009-09-09
ZHANJIANG NORMAL UNIV
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as literature 2 (Y.Luo, W.She, S.Wu, et al. Improvement of all-optical switching effect based onazobenzene-containing polymer films [J]. Applied Physics B, 2005, 80: 77-80) for the above For the same sample, under the conditions of switching frequency of

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
  • Novel method and model for improving modulation depth of dye doped organic thin film all-optical switch
  • Novel method and model for improving modulation depth of dye doped organic thin film all-optical switch
  • Novel method and model for improving modulation depth of dye doped organic thin film all-optical switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Ethyl Red (ER) doped polymethyl methacrylate (PMMA) polymer film sample (doping concentration 10%), at modulation frequency f m = 100Hz and different excitation light (room temperature 25 ℃) the relationship between the relative transmission intensity of the detection light and time (that is, the all-optical switch signal) is as follows Figure 5 shown. Figure 5 In (a) excitation by single linearly polarized light (4.8mW), (b) alternate excitation by linearly polarized light (4.8mW) and circularly polarized light (1.6mW), (c) two orthogonal linearly polarized light (4.8 mW and 1.6mW) alternate excitation. Depend on Figure 5 It can be seen that under weak excitation power, the recovery time (90% of the switching peak value drops to 10%) of the all-optical switch for the three excitation modes of single linear polarization, linear-circular polarization and orthogonal linear polarization is 1.8 ms, respectively. , 1.5ms and 0.9ms, the recovery time of orthogonal linea...

Embodiment 2

[0038] Ethyl Red (ER) doped polymethyl methacrylate (PMMA) polymer film sample (doping concentration 10%), at modulation frequency f m = 1000Hz and different excitation light (room temperature 25 ℃) the relationship between the relative transmission intensity of the probe light and time is as follows Figure 6 shown. Figure 6 Represents that under the condition that the modulation frequency increases (relative to Example 1) and the excitation light power is constant (4.8mW of single linearly polarized light, 4.8mW and 1.6mW of linearly-circularly polarized light, 4.8mW and 1.6mW of orthogonal linearly polarized light mW) All-optical switching signals of three excitation modes. Depend on Figure 6 It can be seen that the modulation depths of the all-optical switches of the three excitation modes are 36%, 45.8% and 100%, respectively, and the modulation depths of the orthogonal linearly polarized light excitation are 177.8% and 118.3% greater than those of the single linearly...

Embodiment 3

[0040] Methyl Red (Methyl Red) doped polymethyl methacrylate (PMMA) polymer film sample (doping concentration 6%), at the modulation frequency f m = 200Hz and under different excitation light conditions (room temperature 25 ° C) the relationship between the relative transmission intensity of the probe light and time is as follows Figure 7 shown. Figure 7 In (a) single linearly polarized light PL1 (8mW), (b) linearly polarized light PL1 (8mW) and circularly polarized light PLc (7.6mW), (c) two beams of orthogonal linearly polarized light PL1 (8mW) and PL2 (7.6mW). The switching modulation depths of the three excitation modes are 22.3%, 55.3% and 100%, respectively, and the modulation depths of the orthogonal linearly polarized light excitation are 348.4% and 80.8% greater than those of the single linearly polarized light and linear-circularly polarized light excitation, respectively.

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

No PUM Login to view more

Abstract

The invention relates to a novel method and a model for improving the modulation depth of a dye doped organic thin film all-optical switch. The method has the following main characteristics that: two linearly polarized light beams which are orthogonal and have a phase difference of 180 degrees are used to excite the switch in an alternating way to speed up a restoration process of the switch, so as to increase the speed and the modulation depth of the switch and increase the speed and modulation depth of the all-optical switch at low exciting power at the same time. The invention also provides a novel all-optical switch model based on the novel method, namely, an orthogonal linearly polarized light excited dye doped organic thin film all-optical switch module. The method has the advantages that: the response speed of the all-optical switch is increased obviously; the modulation depth of the all-optical switch under conditions of a low exciting light power and a high speed switching frequency is obviously improved; and compared with the prior all-optical switch, the orthogonal linearly polarized light excited all-optical switch has a simpler optical path and adjusting method.

Description

technical field [0001] The invention relates to a new method for improving the modulation depth of dye-doped organic thin film all-optical switches. The main feature of the method is to use two orthogonal beams of linearly polarized light with a phase difference of 180° to alternately excite the switch to achieve low excitation power. The purpose of speeding up the switching speed and improving the modulation depth of the switch belongs to the field of photonics. Background technique [0002] Photonic switch is an important device for optical communication and optical information processing, and it is also one of the indispensable components to realize the intelligence of all-optical devices. Because the azobenzene chromophore dye-doped polymer film has strong weak light nonlinear effect and photoinduced birefringence effect, and has the advantages of low production cost, its optical and thermal properties can be adjusted by molecular structure design, etc., Therefore, it h...

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
no application Login to view more
IPC IPC(8): G02F1/35G02F1/361G02B27/28
Inventor 许棠陈桂英
Owner ZHANJIANG NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap