X-Junction Polymeric Optical Switch
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X-Junction Polymeric Optical Switch
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X-Junction Polymeric Optical Switch
- 1. 1 By: Hojjatollah Sarvari Department of Electrical Engineering Shiraz University, Shiraz-Iran November-2008 X-Junction Polymeric Optical Switch
- 2. 2 INTRODUCTION -- First X-DOS by Silberberg in 1987 with LiNbO3 -- Polymers have high thermo-optic coeffecient and low thermal conductance -- Important parameters of switches are: Crosstalk Transmision characteristic Switching time Bandwidth Power consumption
- 3. 3 A NOVEL TYPE OF 2x2 DIGITAL OPTICAL SWITCH REALIZED BY POLYMER WAVEGUIDE TECHNOLOGY Norbert Keil, Huihai Yao, Crispin Zawadzki 22nd European Conference on Optical Communication - ECOC’96, Oslo • PMMA (poly methyl methacrylate) Refractive index is 1.5465 • θ<Δβ/Ɣ: fundamental mode to waveguide with high n first higher mode to waveguide with low n • Β is difference propagation constants • For θ=0.08 degree and λ=1.55um & λ=1.3um Insensitive to wavelenght and polarization With power consumption of 45mw crosstalk is less than -25db Switching time is less than 1ms
- 4. 4 A NOVEL TYPE OF 2x2 DIGITAL OPTICAL SWITCH REALIZED BY POLYMER WAVEGUIDE TECHNOLOGY Norbert Keil, Huihai Yao, Crispin Zawadzki 22nd European Conference on Optical Communication - ECOC’96, Oslo
- 5. 5 A NOVEL TYPE OF 2x2 DIGITAL OPTICAL SWITCH REALIZED BY POLYMER WAVEGUIDE TECHNOLOGY Norbert Keil, Huihai Yao, Crispin Zawadzki 22nd European Conference on Optical Communication - ECOC’96, Oslo Pel-E2 = 65 mw Pel-E2’ >45 mw crosstalk < -25 dB Pel-EI = 45 mw Pel-E2’ >45 mw crosstalk < -25 dB Switching time is less than 1ms
- 6. 6 Asymmetric X-Junction Thermooptic Switches Based on Fluorinated Polymer Waveguides Min-Cheol Oh,Hyung-Jong Lee, Myung-Hyun Lee,Joo-Heon Ahn IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 10, NO. 6, JUNE 1998 FPAE (fluorinated poly arylene ethers) as core PFCB (Perfluorocyclobutane) as cladd Crosstalk less than -20db Switching power is 10mw Insertion loss 4.5db Risetime is 2ms
- 7. 7 A DIGITAL OPTICAL SWITCH (DOS) IN POLYMER USING TRUNCATED-STRUCTURAL X-BRANCHES (TSXB) M.K.Pandit,H.P.Chan,K.S.Chiang,S. Ghosh and A.K.Das MICROWAVE AND OPTICAL TECHNOLOGY LETTERS / Vol. 27, No. 4, November 20 2000 PMMA (poly methyl methacrylate) Refractive index is 1.5465 Advantages of TSXB: Decrease sensivity to Fabrication process Usefull for Wide-angle applications For Bandwidth : 145nm (1470-1615 nm) include C & L bands: Crosstalk < -18db This structure with BCB(benzocyclobutene) and A=0.7 degree bandwidth is 230nm (1390-1620) crosstalk less than -20 db NXB TSXB
- 8. 8 A DIGITAL OPTICAL SWITCH (DOS) IN POLYMER USING TRUNCATED-STRUCTURAL X-BRANCHES (TSXB) M.K.Pandit,H.P.Chan,K.S.Chiang,S. Ghosh and A.K.Das MICROWAVE AND OPTICAL TECHNOLOGY LETTERS / Vol. 27, No. 4, November 20 2000 Normal State Switched State
- 9. 9 A DIGITAL OPTICAL SWITCH (DOS) IN POLYMER USING TRUNCATED-STRUCTURAL X-BRANCHES (TSXB) M.K.Pandit,H.P.Chan,K.S.Chiang,S. Ghosh and A.K.Das MICROWAVE AND OPTICAL TECHNOLOGY LETTERS / Vol. 27, No. 4, November 20 2000 Normal State Switched State
- 10. 10 A DIGITAL OPTICAL SWITCH (DOS) IN POLYMER USING TRUNCATED-STRUCTURAL X-BRANCHES (TSXB) M.K.Pandit,H.P.Chan,K.S.Chiang,S. Ghosh and A.K.Das MICROWAVE AND OPTICAL TECHNOLOGY LETTERS / Vol. 27, No. 4, November 20 2000 λ=1.45um & crosstalk= -22db λ=1.55um & crosstalk=-18db With D1=2.2um D2=3.15um minimum crosstalk shifts to λ=1550nm Other work with BCB at 2002 yield: crosstalk: -20db bandwidth: 230nm (1390-1620nm)
- 11. 11 Polyimide-waveguide-based thermal optical switch using total-internal-reflection effect Jianyi Yang, Qingjun Zhou, and Ray T. Chen Appl. Phys. Lett., Vol. 81, No. 16, 14 October 2002 Ultradel 9120 with n=1.535 as core Ultradel 9020 with n=1.527 as cladd At λ=1.55um crosstalk less than -28db Independent of polarization Switching time is 2ms
- 12. 12 Polyimide-waveguide-based thermal optical switch using total-internal-reflection effect Jianyi Yang, Qingjun Zhou, and Ray T. Chen Appl. Phys. Lett., Vol. 81, No. 16, 14 October 2002 V=0 , cross state V>0 , bar state
- 13. 13 A Wide-Angle X-Junction Polymeric Thermooptic Digital Switch With Low Crosstalk Hau Ping Chan, Chi Kin Chow, and Alok K. Das IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 15, NO. 9, SEPTEMBER 2003 BCB(benzocyclobutene) with n=1.54 as core At λ=1.55um crosstalk less than -24db rise time is 140us & fall time is 210us
- 14. 14 A Wide-Angle X-Junction Polymeric Thermooptic Digital Switch With Low Crosstalk Hau Ping Chan, Chi Kin Chow, and Alok K. Das IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 15, NO. 9, SEPTEMBER 2003
- 15. 15 Polarization-Independent All-Wave Polymer-Based TIR Thermo-Optic Switch Xiaolong Wang, Brie Howley, Maggie Y. Chen, and Ray T. Chen JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 24, NO. 3, MARCH 2006 ZPU12-460 with n=1.46 as core ZPU12-450 with n=1.45 as cladd Dimension is reduced so power is reduced to 25-26mw risetime=1.5ms & falltime=2ms Bandwidth=4200nm (.6-4.8um)
- 16. 16 Polarization-Independent All-Wave Polymer-Based TIR Thermo-Optic Switch Xiaolong Wang, Brie Howley, Maggie Y. Chen, and Ray T. Chen JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 24, NO. 3, MARCH 2006 D & L & θ are three important parameters 1) D=50um & θ=4 degree 2) L=1400um & θ=4 degree 3) D=50um & L=1400um
- 17. 17 Polarization-Independent All-Wave Polymer-Based TIR Thermo-Optic Switch Xiaolong Wang, Brie Howley, Maggie Y. Chen, and Ray T. Chen JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 24, NO. 3, MARCH 2006 risetime=1.5ms & falltime=2ms Bandwidth=4200nm (.6-4.8um)
- 18. 18 Thanks for your attention !