The traffic buffering problems in the ethernet over synchronous digital hierarchy(EOS) are introduced and analyzed. Different solutions are also presented in detail. Synchronous DRAM(SDRAM) is used as off-chip buffer ...The traffic buffering problems in the ethernet over synchronous digital hierarchy(EOS) are introduced and analyzed. Different solutions are also presented in detail. Synchronous DRAM(SDRAM) is used as off-chip buffer to store-and-retransmission ethernet frames. A new and easy control design is introduced here. The buffer area size on chip is greatly reduced and the power dissipation is lowed at the same time.展开更多
The traditional lift-off process can hardly be carried out in ultraviolet nanoimprint defined patterns due to the poor solubility of the ultraviolet resist. Moreover, the depth of lift-off pattern defined by an ultrav...The traditional lift-off process can hardly be carried out in ultraviolet nanoimprint defined patterns due to the poor solubility of the ultraviolet resist. Moreover, the depth of lift-off pattern defined by an ultraviolet nanoimprint is limited by that of the soft mold. In this work, a modified nanoimprint process by a multi-layer mask method is introduced to enhance the depth of the final lift-of[pattern. Pillar photonic crystal is fabricated from the hole pattern defined by NIL to prove the pattern-reversal capability. On its basis, combining the features of overetehing technology and the lateral diffusion phenomenon in the metal depositing process, pillar-shaped photonic crystal stamps with different duty cycles have been fabricated by adjusting the etching time of the lift-off layer. Based on this process, a 50-nm line width metal grating is fabricated from a soft stamp with an aspect ratio as low as 1.展开更多
Simultaneous multiple wavelength lasing is demonstrated using a novel in-fiber comb fil-ter. The filter is based on a fiber Bragg grating asymmetrically located in a Sagnac loop. Two filters with four band-passes and ...Simultaneous multiple wavelength lasing is demonstrated using a novel in-fiber comb fil-ter. The filter is based on a fiber Bragg grating asymmetrically located in a Sagnac loop. Two filters with four band-passes and five band-passes, respectively, were fabricated and applied to an erbium-doped fiber ring laser. Stable four-wavelength and five-wavelength laser operations have been demon-strated.展开更多
文摘The traffic buffering problems in the ethernet over synchronous digital hierarchy(EOS) are introduced and analyzed. Different solutions are also presented in detail. Synchronous DRAM(SDRAM) is used as off-chip buffer to store-and-retransmission ethernet frames. A new and easy control design is introduced here. The buffer area size on chip is greatly reduced and the power dissipation is lowed at the same time.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11044009, A040507, 61076042 and 60607006, the Special Project on Development of National Key Scientific Instruments and Equipment of China under Grant No 2011YQ16000205, the National Key Technology Research and Development Program of China under Grant No 2009BAH49B01, the National High-Technology Research and Development Program of China under Grant Nos 2011AA010304 and 2011AA03A106, and the Grand Science and Technology Special Project in Hubei Province under Grant No 2009AAA009.
文摘The traditional lift-off process can hardly be carried out in ultraviolet nanoimprint defined patterns due to the poor solubility of the ultraviolet resist. Moreover, the depth of lift-off pattern defined by an ultraviolet nanoimprint is limited by that of the soft mold. In this work, a modified nanoimprint process by a multi-layer mask method is introduced to enhance the depth of the final lift-of[pattern. Pillar photonic crystal is fabricated from the hole pattern defined by NIL to prove the pattern-reversal capability. On its basis, combining the features of overetehing technology and the lateral diffusion phenomenon in the metal depositing process, pillar-shaped photonic crystal stamps with different duty cycles have been fabricated by adjusting the etching time of the lift-off layer. Based on this process, a 50-nm line width metal grating is fabricated from a soft stamp with an aspect ratio as low as 1.
基金This work was supported by the Na-tional Natural Science Foundation of China (Grant No. 69587003) .
文摘Simultaneous multiple wavelength lasing is demonstrated using a novel in-fiber comb fil-ter. The filter is based on a fiber Bragg grating asymmetrically located in a Sagnac loop. Two filters with four band-passes and five band-passes, respectively, were fabricated and applied to an erbium-doped fiber ring laser. Stable four-wavelength and five-wavelength laser operations have been demon-strated.
