9 FIBER OPTIC, MICRO OPTIC AND INTEGRATED OPTICAL COMPONENTS, MODULES AND DEVICES FOR USE IN OPTIC AND ELECTRICAL DATA TRANSMISSION, NAMELY, A WAVE-LENGTH DIVISION MULTIPLEXING FILTER WITH A DIFFERENT NUMBER OF CHANNELS AND DIFFERENT CHANNEL SEPARATION, DENSE WAVELENGTH DIVISION MULTIPLEXING FILTERS WITH A DIFFERENT NUMBER OF CHANNELS AND DIFFERENT CHANNEL SEPARATION, FIBER OPTIC SPLITTERS AND COUPLERS, FIBER OPTIC SWITCHES, FIBER OPTIC PLUGS, FIBER OPTIC COLLIMATORS, FIBER OPTIC CONNECTORS, MODE FIELD TRANSFORMERS BETWEEN DIFFERENT FIBER OPTIC FIBERS, FIBER OPTIC CIRCULATORS, FIBER OPTIC EMITTERS, NAMELY, LASER DIODE EDGE EMITTERS AND LIGHT EMITTING DIODES; FIBER OPTIC RECEIVERS, COMBINED FIBER OPTIC EMITTER AND RECEIVER, NAMELY, A FIBER OPTIC TRANSCEIVER, COMBINED DEVICES CONSISTING OF THE ABOVE MENTIONED COMPONENTS, NAMELY, AN EMITTER AND RECEIVER DEVICE WITH INTEGRATED WAVELENGTH DIVISION MULTIPLEXING FILTERS, AND PARTS THEREOF, ALL FOR USE IN TELECOMMUNICATION NETWORKS AND COMPUTER DATA NETWORKS, COMPUTER SYSTEMS, BACK PLANES, BUS SYSTEMS, PROCESS CONTROL SYSTEMS, VEHICLES, AIRPLANES AND SENSOR NETWORK