By Achyut K. Dutta, Niloy K. Dutta, Masahiko Fujiwara
The communications is on the onset of recent enlargement of WDM expertise essential to meet the hot call for for bandwidth. this can be the second one of a 4 reference books that would conceal this expertise comprehensively with all the significant themes coated by way of a separate volumes - i.e. energetic parts, passive parts, structures and networks. This publication is the 1st which covers all key passive optical parts required for present and subsequent iteration optical communique platforms. World-renowned authors, who're pioneers of their learn quarter, have written the chapters of their strong point. The publication highlights not just the main of operation and features of the passive optical elements, but additionally offers an in-depth account of the state of the art method purposes. - is helping the reader to decide on the perfect equipment for a given process application.- offers the reader with perception and knowing for key passive optical parts usually being / for use within the optical conversation platforms, crucial construction blocks of today's/next iteration fiber optic networks.- permits engineers operating in several optical communique areas(i.e. from approach to component), to appreciate the primary and mechanics of every key part they care for for optical approach design.- Covers Planar lightwave circuit (PLC) established router, various optical switches applied sciences (based on MEMS, thermo-optic, and electro-optic) and assorted optical amplifier applied sciences (based on semiconductor optical amplifier, EDFA ,and raman amplifier). - Highlights the working precept of every part, approach purposes, and in addition destiny possibilities.
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Additional resources for WDM Technologies: Passive Optical Components (WDM Technologies)
13, >^14, >^15, >^16. The 8 wavelengths coupled into, for example, input port #18 are distributed among output ports #a to #h. The 8 wavelengths carried by other input ports are distributed in the same way, but cyclically rotated. In this way each output port receives 8 different wavelengths, one from each input port. Original Output Port 5 6 9 Ai 10 A2 • 11 • 12 Original Input Port 7 13 14 15 9 10 11 12 A2 A3 A4 As Ae A7 As Ag A3 A4 As Ae A7 As Ag A10 All Ai2 Ai3 Ai4 Ais Aie Ai7 Ais Aig A3 A4 As Ae A7 As Ag A10 Aii| A12 Ai3 Ai4 Ais Aie Ai7 Ais Aig A20 A4 As Ae A7 As Ag A10 All A12 Al3 Ai4 Ais Aie Ai7 A18 Aig A20 A21 8 16 17 18 19 20 21 22 A10 All Ai2 Ai3 A|4 Ai5 Aie Ai7 Ais " 13 A5 Ae A7 As Ag A10 All A12 A13 Al4 Ais Aie Ai7 Ais Aig A20 A21 A22 • 14 Ae A7 As • 15 A7 As Ag A10 All A12 Ai3 Al4 A15 A16 Al7 A18 Aig| A20 A21 A22 A23 A24 • 16 As A9 A10 Aii| A12 Ai3 Ai4Al5 A16 Al7 A18 Aigj A20 A21 A22 A23 A24 A25 • 17 A9 A10 Ag A10 AII|AI2 ArjA12 A13 Ai4 Al3 Al4 Ais Aie Ai7 Ais Aigj A20 A21 A22 A23 Ai5 A16 A17 Ais Aig| A20 A21 A22 A23 A24 A2S A2e • 18 A10 A n A12 Ai3 Ai4 Al5 A16 Al7 A18 Ai9 A20 A21 A22 A23 A24 A25 A26 A27 19 A11 A12 Ai3 Al4 Ai5 A16 Ai7 Ais Aig A20 A21 A22 A23 A24 A25 A26 A27 A2S 20 A12 Ai3 Ai4 Al5 A16 Al7 A18 Aig A20 A21 A22 A23 A24 A25 A26 A27 A28 A2g ' 3dB Combiners Tt a Fig.
11 shows the Fig. 11 Schematic configuration of uniform-loss and cyclic-frequency (ULCF) AWG. 2. Arrayed-Waveguide (AWG) Router 25 schematic configuration of an 8 x 8 uniform-loss and cyclic-frequency (ULCF) arrayed-waveguide grating. It consists of a 28-channel AWG multiplexer with 200-GHz spacing and 8 optical combiners, which are connected to 16 output waveguides of the multiplexer. 3 /xm between neighboring waveguides. 6 THz. In the input side, 8 waveguides ranging from #11 to #18 are used for the input waveguides so as to secure the uniform loss characteristics.
K. Okamoto. Chapter 9 © 2000. ~,ith permission from Elsevier Science. 30 Katsunari Okamoto Main output Drop port Waveguides Half waveplat/ / ^ ^ H Hllli ^ Grooves Half \ jlllll waveplat^^^^Mii Main input Fig. 17 Add port Double gate TO switch with MMI coupler Configuration of athermal 16-channel optical ADM. all optical WDM routing systems and allow the network to be transparent to signal formats and bit rates. In order to make PLC devices temperature insensitive, silica-based AWGs incorporating silicone adhesive in the arryed-waveguide region have been developed [17, 18].