| 摘要 |
PCT No. PCT/GB92/02318 Sec. 371 Date Jul. 6, 1994 Sec. 102(e) Date Jul. 6, 1994 PCT Filed Dec. 14, 1992 PCT Pub. No. WO93/13427 PCT Pub. Date Jul. 8, 1993A device and a process for enabling an incident wide bandwidth (greater than about 1 GHz) short duration (less than about 10 microseconds) individual pulse of electromagnetic radiation to be digitally sampled at a sampling rate that is achievable by available digital sampling circuits. The incident pulse is modulated onto an optical signal to form a modulated optical signal and the whole, or successive or randomly selected parts, of the modulated optical signal are replicated using optical time delay means. The resulting plurality of modulated optical signal representations of the whole or parts of the incident pulse can then be digitally sampled at a sampling rate which is reduced in proportion to the number of replications to obtain a complete digital representation of the incident pulse.
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