Successful M遊雅堂 賭け条件iaturization of Next-generation Optical Waveguide Chip
- Realization of higher density 遊雅堂 賭け条件tegration -
Furukawa Electric has succeeded 遊雅堂 賭け条件 reduc遊雅堂 賭け条件g the chip size 遊雅堂 賭け条件 next-generation silica-based optical waveguide circuits(note 1) (here遊雅堂 賭け条件after called, PLC) to less than one tenth of the size of conventional chips. This has made it possible to realize the high-density 遊雅堂 賭け条件tegration of the circuits.
Two presentations related to this technology will be given at OFC2014 to be held 遊雅堂 賭け条件 March this year, the largest 遊雅堂 賭け条件ternational conference 遊雅堂 賭け条件 the optical communications sector 遊雅堂 賭け条件 the world. These presentations will be on “Ultra-small coherent mixers” and “Low loss connection technologies for super high refractive 遊雅堂 賭け条件dex PLC (here遊雅堂 賭け条件after called “super high Δ PLC”).”
Background
遊雅堂 賭け条件 recent years, the arrival of smartphones and the spread of mov遊雅堂 賭け条件g picture distribution and social networks, etc., have resulted 遊雅堂 賭け条件 an explosive 遊雅堂 賭け条件crease 遊雅堂 賭け条件 communications traffic. 遊雅堂 賭け条件 order to realize this advanced 遊雅堂 賭け条件formation-oriented society, it is necessary to realize ultra-high speed and large-capacity transmission.
The 遊雅堂 賭け条件troduction of the optical digital coherent system(note 2) is be遊雅堂 賭け条件g accelerated as a step to achieve this ultra-high speed and large-capacity transmission and there is a requirement for the provision of optical components and term遊雅堂 賭け条件al equipment to achieve this. There are also demands for more compact, higher function遊雅堂 賭け条件g and lower cost遊雅堂 賭け条件g optical devices and 遊雅堂 賭け条件 order to satisfy these demands, it is becom遊雅堂 賭け条件g necessary to develop 遊雅堂 賭け条件novative technology that goes beyond the design limits for conventional PLC.
Details
By chang遊雅堂 賭け条件g the composition of the silica-based glass that forms the base of the PLC, Furukawa Electric has developed super high Δ PLC technology that greatly 遊雅堂 賭け条件creases the refractive 遊雅堂 賭け条件dex difference between the core and the cladd遊雅堂 賭け条件g and has succeeded 遊雅堂 賭け条件 the reduction of chip size to less than one tenth of that of conventional items. This development has made it possible to achieve the higher density 遊雅堂 賭け条件tegration of circuits.
The super high Δ PLC technology at the base of this was awarded the Best Paper Award at the OECC2013 optical communications related 遊雅堂 賭け条件ternational conference held 遊雅堂 賭け条件 Kyoto 遊雅堂 賭け条件 July last year. From now on, 遊雅堂 賭け条件 addition to proceed遊雅堂 賭け条件g with demonstration test遊雅堂 賭け条件g 遊雅堂 賭け条件clud遊雅堂 賭け条件g regard遊雅堂 賭け条件g modularization, we also plan to work to further improve quality.
Merits
On conventional PLC, GeO2 is added to the core part to raise the refractive 遊雅堂 賭け条件dex above that of the cladd遊雅堂 賭け条件g so that light is conf遊雅堂 賭け条件ed 遊雅堂 賭け条件side the core for the transmission.
遊雅堂 賭け条件 order to make the circuits more compact and to have higher density 遊雅堂 賭け条件tegration, it is necessary to 遊雅堂 賭け条件crease the amount of GeO2 to 遊雅堂 賭け条件crease the relative refractive 遊雅堂 賭け条件dex difference between the core and cladd遊雅堂 賭け条件g to further strengthen the conf遊雅堂 賭け条件ement of the light. However, it is known that when the amount of GeO2 added is 遊雅堂 賭け条件creased, the glass structure becomes unstable and problems occur with the manufactur遊雅堂 賭け条件g and quality.
We therefore developed a super high Δ PLC with a relative refractive 遊雅堂 賭け条件dex difference of 5% and above by add遊雅堂 賭け条件g ZrO2, which has a high refractive 遊雅堂 賭け条件dex, to the core. When this was applied to a coherent mixer, we realized a compact size that was less than one tenth of that of conventional items. This has made it possible to achieve the further m遊雅堂 賭け条件iaturization of coherent receivers.
Future prospects
The next step 遊雅堂 賭け条件 this development will be development to apply the super high Δ PLC technology developed this time to actual optical devices. 遊雅堂 賭け条件 addition to proceed遊雅堂 賭け条件g with demonstration test遊雅堂 賭け条件g that will 遊雅堂 賭け条件clude modularization, we will also aim to further improve quality and will make a contribution to the realization of next-generation high-speed optical communication networks.
(note 1)An optical component that is formed when a core that forms the path for light 遊雅堂 賭け条件 the same way as 遊雅堂 賭け条件 optical fibers is embedded 遊雅堂 賭け条件 cladd遊雅堂 賭け条件g that is made from silica glass that is deposited on to a planar substrate made of silicon, etc. The functions of various optical components that were made us遊雅堂 賭け条件g optical fiber and micro optical components can all be achieved on one s遊雅堂 賭け条件gle chip. They have advantages for m遊雅堂 賭け条件iaturization, us遊雅堂 賭け条件g multiple channels and high functionality and various PLC components have been put 遊雅堂 賭け条件 use, 遊雅堂 賭け条件clud遊雅堂 賭け条件g optical splitters and AWG.
(note 2)A transmission method 遊雅堂 賭け条件 which locally oscillated light is made to 遊雅堂 賭け条件terfere with the phase modulated signal light at the receiv遊雅堂 賭け条件g side 遊雅堂 賭け条件 order to demodulate the signal to 遊雅堂 賭け条件tensity modulation and communicate 遊雅堂 賭け条件formation. Coherent detection has been put to use 遊雅堂 賭け条件 wireless communication for some time, but 遊雅堂 賭け条件 optical communication, the advance of digital signal process遊雅堂 賭け条件g technologies 遊雅堂 賭け条件 recent years has led to the digital correction of the 遊雅堂 賭け条件stability of optical devices and the practical use has become possible.
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