Research And Fabrication For ROADM Based On Polymer Materials

With the rapid development of science and technology, our life is becoming moreand more convenient and the need for all kinds of information is growing at the sametime. Obviously the current communication system is unable to fulfill the explosiveincrease in need for information. The newly developed transmission technology whichis based on all-optical-network (AON) is now replacing the current fiber transmissionsystem and promoting the informatization in whole world. As the key part of thedense wavelength division multiplexing (DWDM) system, the reconfigurable opticaladd/drop multiplexer (ROADM) can realize configuration of optical signal containingmulti-wavelength and it plays a very important role in enhance the transmissionefficiency of the AON. The research of the ROADM in performance and applicationis attracting more and more attention.The research in integration of the ROADM has been carried out before, and lowprice with high working efficiency can be achieved with integration. We pay ourattentions on polymer materials in consider of integration, and carried out someresearch by replacing the conventional in-organic materials. The polymer materialsare cheaper, easily adjusted in refractive index and more simple in fabricationcompared to in-organic materials. And the integration of the ROADM is easilyrealized with polymer. A lot of works focused on integration with polymer materialsfor the ROADM have been carried out for a long time.In this paper, a ROADM based on arrayed waveguide grating (AWG) is introduced and the following are the main work of our research.(1) The research for P(MMA GMA)and NOA73（Norland Optical Adhesive73）/SU8materials is carried out, and the detailed parameters for this two kinds ofmaterials in fabrication is optimized.(2) An AWG multiplexer working at650nm is designed and fabricated withmaterial by optimizing its structure. The test is carried out and agood light-transfer characteristic is obtained. The channel spacing is in accordancewith design.(3) A ROADM is designed based on AWG and its structure is optimized in detail.Calculation and analysis about the time-delay-lines and wavelength-channel-selectionfunction realized by the electrodes at arrayed waveguides area are conducted.Expected results in accordance with design are obtained by simulation.(4) The ROADM device is fabricated with NOA73/SU8materials. A goodlight-transfer characteristic is observed, and the transmission spectral is in goodaccordance with design. The output signal will shift when temperature of the electrodearray changes4Cwhich achieve the wavelength-channel selection function. A20pstime delay can be introduced in the TTD lines array. The time response of the TOswitch is tested and the rise time is190μs while the fall time is350μs with theextinction ratio is15.5dB and switching power is9.5mW.