最新光纤网络世界记录:2500公里,16.4 Tbits/sec (41.8 Petabits/sec*km.)
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最新光纤网络世界记录:2500公里,16.4 Tbits/sec (41.8 Petabits/sec*km.)
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Alcatel-Lucent presents breakthroughs for optical networking
FEBRUARY 28, 2008 -- Alcatel-Lucent (search for Alcatel-Lucent) has announced, in four post-deadline papers accepted at OFC/NFOEC in San Diego, CA, a new optical transmission record and three new photonic integrated circuits.
Bell Labs (search for Bell Labs) researchers, in partnership with Alcatel-Thales' III-V Lab and the optical solution company Kylia (search for Kylia), have achieved successful transmission of 16.4 Tbits/sec of optical data over 2,550 km. This transmission was achieved using 164 WDM channels modulated at 100 Gbits/sec and, says Alcatel-Lucent, represents a world record for capacity x distance at 41.8 Petabits/sec*km.
Several new technologies were used, including a highly linear, balanced optoelectronic photoreceiver and an ultracompact, temperature-insensitive coherent mixer. This result is a critical step forward in enabling 100-Gbit/sec Ethernet, says the company. It ensures the maximum exploitation of the fiber bandwidth to cope with future capacity needs by providing very high information spectral density at 2 bits/sec/Hz.
Three papers from Bell Labs researchers at Holmdel, NJ, were accepted for the conference. They describe the development of three new photonic ICs developed to achieve 100 Gbits/sec with a high spectral efficiency. In the first of the papers, researchers developed an integrated high-speed receiver using DQPSK modulation that is about 1,000x smaller than existing DQPSK receivers that are built out of discrete components.
Another paper demonstrated a dual-polarization modulator with a 40-Gbit/sec data stream in one polarization and a different 40-Gbit/sec data stream in another. This technique doubles the capacity of a link without requiring any additional bandwidth, said the researchers.
The last paper presents a modulator producing a 16-QAM signal format, used for systems with extremely high spectral efficiency. While this format is well known in wireless and satellite communications, its use in optics is new.
Alcatel-Lucent presents breakthroughs for optical networking
FEBRUARY 28, 2008 -- Alcatel-Lucent (search for Alcatel-Lucent) has announced, in four post-deadline papers accepted at OFC/NFOEC in San Diego, CA, a new optical transmission record and three new photonic integrated circuits.
Bell Labs (search for Bell Labs) researchers, in partnership with Alcatel-Thales' III-V Lab and the optical solution company Kylia (search for Kylia), have achieved successful transmission of 16.4 Tbits/sec of optical data over 2,550 km. This transmission was achieved using 164 WDM channels modulated at 100 Gbits/sec and, says Alcatel-Lucent, represents a world record for capacity x distance at 41.8 Petabits/sec*km.
Several new technologies were used, including a highly linear, balanced optoelectronic photoreceiver and an ultracompact, temperature-insensitive coherent mixer. This result is a critical step forward in enabling 100-Gbit/sec Ethernet, says the company. It ensures the maximum exploitation of the fiber bandwidth to cope with future capacity needs by providing very high information spectral density at 2 bits/sec/Hz.
Three papers from Bell Labs researchers at Holmdel, NJ, were accepted for the conference. They describe the development of three new photonic ICs developed to achieve 100 Gbits/sec with a high spectral efficiency. In the first of the papers, researchers developed an integrated high-speed receiver using DQPSK modulation that is about 1,000x smaller than existing DQPSK receivers that are built out of discrete components.
Another paper demonstrated a dual-polarization modulator with a 40-Gbit/sec data stream in one polarization and a different 40-Gbit/sec data stream in another. This technique doubles the capacity of a link without requiring any additional bandwidth, said the researchers.
The last paper presents a modulator producing a 16-QAM signal format, used for systems with extremely high spectral efficiency. While this format is well known in wireless and satellite communications, its use in optics is new.
no security measure is worth anything if an attacker has physical access to the machine
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磁带机在备份的速度上早就超过硬盘了。磁带机的缺点是查找定位慢。fortruth 写了:磁带速度很快么。还没有用过,ms古董一样的东西。!skyx 写了:到那时硬盘早淘汰了,但磁带机一直会存在下去。bones7456 写了:如果在目前的硬件上用这网速,估计也不会有太大感觉,硬盘速度跟不上的.
磁带机工作在后台,tar命令的终级目标就是磁带机!
我的梦想就是大家都用上磁带机,虽然我用的磁带机很烂:hp 35480A ,一个朋友送给我的。hp35480a 在win98下都不用装驱动。
我非常喜欢磁带机发出的那种美妙的声响。dds小盒带也很酷。
现在一盒磁带的容量非常大,很惊人
no security measure is worth anything if an attacker has physical access to the machine
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磁带和读带机价格怎么样skyx 写了:磁带机在备份的速度上早就超过硬盘了。磁带机的缺点是查找定位慢。fortruth 写了:磁带速度很快么。还没有用过,ms古董一样的东西。!skyx 写了:到那时硬盘早淘汰了,但磁带机一直会存在下去。bones7456 写了:如果在目前的硬件上用这网速,估计也不会有太大感觉,硬盘速度跟不上的.
磁带机工作在后台,tar命令的终级目标就是磁带机!
我的梦想就是大家都用上磁带机,虽然我用的磁带机很烂:hp 35480A ,一个朋友送给我的。hp35480a 在win98下都不用装驱动。
我非常喜欢磁带机发出的那种美妙的声响。dds小盒带也很酷。
现在一盒磁带的容量非常大,很惊人
容量有多大?
一般电子市场有卖吗??
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一般一万多吧,大小和台式机光驱一样。me 写了:磁带和读带机价格怎么样skyx 写了:磁带机在备份的速度上早就超过硬盘了。磁带机的缺点是查找定位慢。fortruth 写了:磁带速度很快么。还没有用过,ms古董一样的东西。!skyx 写了:到那时硬盘早淘汰了,但磁带机一直会存在下去。bones7456 写了:如果在目前的硬件上用这网速,估计也不会有太大感觉,硬盘速度跟不上的.
磁带机工作在后台,tar命令的终级目标就是磁带机!
我的梦想就是大家都用上磁带机,虽然我用的磁带机很烂:hp 35480A ,一个朋友送给我的。hp35480a 在win98下都不用装驱动。
我非常喜欢磁带机发出的那种美妙的声响。dds小盒带也很酷。
现在一盒磁带的容量非常大,很惊人
容量有多大?
一般电子市场有卖吗??
no security measure is worth anything if an attacker has physical access to the machine
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- skyx
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无聊,没看到这只是我的梦想吗?zhong 写了:无聊,,家用有必要磁带吗..skyx 写了:到那时硬盘早淘汰了,但磁带机一直会存在下去。bones7456 写了:如果在目前的硬件上用这网速,估计也不会有太大感觉,硬盘速度跟不上的.
磁带机工作在后台,tar命令的终级目标就是磁带机!
我的梦想就是大家都用上磁带机,虽然我用的磁带机很烂:hp 35480A ,一个朋友送给我的。hp35480a 在win98下都不用装驱动。
我非常喜欢磁带机发出的那种美妙的声响。dds小盒带也很酷。
如果能像刻录机那样的价格,,磁带能像空盘那样便宜..用用倒没所为..
no security measure is worth anything if an attacker has physical access to the machine