发明名称 |
Photonic analog-to-digital conversion using light absorbers |
摘要 |
Apparatus and method for high-speed analog-to-digital conversion employs photonic circuits with variable light-absorption. A coherent light source is clocked to produce a stream of coherent light pulses onto which is modulated an analog signal to be converted to digital form. An optical splitter divides the stream of pulses into a number of streams that is proportional to the resolution sought. A passive photonic quantizer absorbs, to a predetermined degree, the light energy of the incident pulse streams. The output of a fully absorbed pulse does not trigger a comparator. Pulse streams of sufficient intensity pass through the light absorbers, and their output does trigger the comparator. The output state of the comparators may be read into a digital memory to form a digital word that represents the analog signal during any discrete clock interval. Most of the elements of the apparatus can be fabricated on a substrate of photonic semiconducting material.
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申请公布号 |
US6326910(B1) |
申请公布日期 |
2001.12.04 |
申请号 |
US20000707155 |
申请日期 |
2000.11.06 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE |
发明人 |
HAYDUK MICHAEL J.;BUSSJAGER REBECCA J.;GETBEHEAD MARK A.;PAYSON PAUL M.;THEIMER JAMES P. |
分类号 |
G02F7/00;H03M1/36;(IPC1-7):H03M1/00;H03M1/12 |
主分类号 |
G02F7/00 |
代理机构 |
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