发明名称 SYSTEM AND METHOD FOR TRANSFERRING MUCH MORE INFORMATION IN OPTIC FIBER CABLES BY SIGNIFICANTLY INCREASING THE NUMBER OF FIBERS PER CABLE
摘要 With the current explosion of information transfer, optic fibers are becomin g faster all the time. Most of the recent advances in the amounts of data that these fibe rs can carry per time unit have come from adding more and more wavelengths (termed lambda s) to the same fiber at the same time, a method which is called DWDM (Dense Wave Division Multiplexing). Today a single optic fiber can carry up to 80 or eve n 160 different lambdas simultaneously and the number is likely to increase furthe r. The fastest bit-rates achieved so far per each lambda are around 10 or 40 Gigabi t per second, but it will be hard to go much beyond this, since higher bit-rates have much lower tolerance to dispersion problems. However, The demand for broadband communications, fueled mainly by the Internet growth, is still growing by a much faster rate than the growth in the abilities of optic fibers. Typically, this deman d has risen in the last few years by a factor of up to 5-fold each year, and this demand wi ll probably continue to grow. The present wisdom concentrates mainly on trying to increa se the number of Lambdas per fiber, but after doubling it a few more times it will be difficult to increase it further. The present invention tries to achieve a large leap in this area by enabling putting much more fibersper cable, such as for example even 1,000 o r 10,000 times more than what is being done today, with an increase in cost that is orders of magnitude smaller. The invention solves various mechanical, optical and electronic problems that stem from trying to cram so many fibers into one cable. One of the most important features is using multi-fiber flexible flat jackets that can move freely within the cable's pipe, preferably only in one direction, preferably with the pipe divided into at least two cells, or even in a single cell, wherein preferably the width o f each such cell is greater than its height, so that the cable can bend only in the direction in which said flat jackets can move freely and can have maximum structural strength, and t he connectors for these jackets can also solve many other problems. Preferably at certain intervals (for example every 1 or 2 meters, or any other convenient interval ) the flat jackets are preferably stitched together to each other and/or for example glued and/or otherwise coupled to each other in a way that preferably does not apply pressure to the optic fibers, and preferably are also coupled, preferably at the stitch position, also to the cable, in order to prevent undesired sliding movement of the jackets against each other and/or against the pipe. Another importantfeature is various methods for optimizing the efficiency of amplifying multiple fibers simultaneously. Another important feature is significantly reducing the cost of the end-equipment by using a novel method of duplicating each lambda into multiple fibers and on/off modulating it separately for each fiber, so that much less laser sources are needed.
申请公布号 CA2610138(A1) 申请公布日期 2009.04.30
申请号 CA20072610138 申请日期 2007.10.30
申请人 MAYER, YARON 发明人 MAYER, YARON
分类号 H04B10/12;G02B6/02;G02B6/04;H04B10/16 主分类号 H04B10/12
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