发明名称 |
MODULATOR FOR FREQUENCY-SHIFT KEYING OF OPTICAL SIGNALS |
摘要 |
Described are an FSK modulator and a method for large-alphabet FSK modulation. The FSK modulator and the method are based on filtering of a multi-tone optical source such as a mode-locked laser which provides a comb distribution of tones. A frequency-selective component selects for transmission a subset of the tones. In various embodiments the frequency-selective component is a Mach-Zehnder interferometer filter or a microring resonator filter. A second frequency-selective component selects a subset of the tones from the comb distribution provided by the first frequency-selective component. Still more frequency-selective components can be used according to the number of tones supplied by the multi-tone optical source to the FSK modulator. The optical signal exiting the last frequency-selective component includes only a single tone which corresponds to the symbol to be transmitted.
|
申请公布号 |
US2013148983(A1) |
申请公布日期 |
2013.06.13 |
申请号 |
US201313748777 |
申请日期 |
2013.01.24 |
申请人 |
INSTITUTE OF TECHNOLOGY MASSACHUSETTS;MASSACHUSETTS INSTITUTE OF TECHNOLOGY |
发明人 |
ROBINSON BRYAN S.;BOROSON DON M.;HAMILTON SCOTT A.;SAVAGE SHELBY J. |
分类号 |
H04B0010/000004 |
主分类号 |
H04B0010/000004 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|