Most algorithms in digital signal processing can be converted to matrix operations. Optical signals are very suitable for matrix operations due to the inherent parallelism and high bandwidth characteristics. Therefore, embedding an optical computing core into an electrical digital signal processor is a very promising high-performance digital signal processing solution. Since Professor JW Goodman of Stanford University in the United States proposed an optical matrix processor based on free-space optics in 1978, optical matrix operations have achieved considerable development.
However, optical matrix processors based on free-space optics have the disadvantages of large size, high power consumption, poor scalability, and slow matrix changes. How to overcome the bottleneck of traditional optical matrix processors has become a major problem in the field of optical computing. S.Eisenbach, chief scientist of Lenslet, a well-known Israeli optical computing company, predicted in the MILCOM2003 report that the future optical matrix operation will be based on silicon technology and will eventually replace the existing electrical processor.
Researchers at the Institute of Semiconductors, Chinese Academy of Sciences began working on the use of free-space optics to implement optical matrix operations at the end of 2007. Researchers combined their own technological advantages and the principles of optical matrix computing, and proposed the world's first silicon-based integrated optical matrix processor (Chinese patent number: ZL.200810116741.0), earlier than the United States Sandia National Laboratory (US invention patent number : US8027587B1). From the generation of ideas to the breakthrough of key technologies, after four years of hard work, researchers in October 2011 realized a carrier-based modulation of silicon-based integrated optical matrix processor, computing speed of 80 million times multiply operations / second.
Theoretical analysis shows that with the increase of operating frequency and integration, the calculation speed of silicon-based integrated optical matrix processor can reach 1015~16 times multiplication/second in the future, which is comparable to ADI's TigerSHARC processor (1.92×1010 MAC/s). 5 orders of magnitude faster.
The research work was recently published on OpticsExpress (20 (2012) 13560-13566), a well-known optical journal, and has received high praise from international counterparts. Professor JW Goodman, a pioneer in international optical computing, commented: “Using wavelength division multiplexing and wavelength selective units can indeed simplify the system, and all units can be integrated on one chip, which is a huge leap forward.â€
However, optical matrix processors based on free-space optics have the disadvantages of large size, high power consumption, poor scalability, and slow matrix changes. How to overcome the bottleneck of traditional optical matrix processors has become a major problem in the field of optical computing. S.Eisenbach, chief scientist of Lenslet, a well-known Israeli optical computing company, predicted in the MILCOM2003 report that the future optical matrix operation will be based on silicon technology and will eventually replace the existing electrical processor.
Researchers at the Institute of Semiconductors, Chinese Academy of Sciences began working on the use of free-space optics to implement optical matrix operations at the end of 2007. Researchers combined their own technological advantages and the principles of optical matrix computing, and proposed the world's first silicon-based integrated optical matrix processor (Chinese patent number: ZL.200810116741.0), earlier than the United States Sandia National Laboratory (US invention patent number : US8027587B1). From the generation of ideas to the breakthrough of key technologies, after four years of hard work, researchers in October 2011 realized a carrier-based modulation of silicon-based integrated optical matrix processor, computing speed of 80 million times multiply operations / second.
Theoretical analysis shows that with the increase of operating frequency and integration, the calculation speed of silicon-based integrated optical matrix processor can reach 1015~16 times multiplication/second in the future, which is comparable to ADI's TigerSHARC processor (1.92×1010 MAC/s). 5 orders of magnitude faster.
The research work was recently published on OpticsExpress (20 (2012) 13560-13566), a well-known optical journal, and has received high praise from international counterparts. Professor JW Goodman, a pioneer in international optical computing, commented: “Using wavelength division multiplexing and wavelength selective units can indeed simplify the system, and all units can be integrated on one chip, which is a huge leap forward.â€
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