发明名称 |
Intensity modulation of optical signals |
摘要 |
A wavelength converter or demultiplexer device comprising first and second stages (30, 40). For wavelength converter action, the first stage impresses an intensity modulation (IM) and phase modulation (PM) on a CW input signal (lambda1) carried by an input DATA signal (lambda2) using cross phase modulation in a non-linear optical element (46). The first stage in an embodiment is a semiconductor laser amplifier loop optical mirror (SLALOM) which has a semiconductor optical amplifier (SOA) as the non-linear optical element. The second stage has a non-linear transfer function and impresses a further IM on the optical signal responsive to the PM impressed in the first stage. In an embodiment, the second stage is a polarization maintaining fiber (PMF) optical loop. The transfer function of the overall device is thus improved by making it steeper and more time confined. This is achieved by combining a fast first stage with a second stage that has a non-linear transfer function, so that the residual PM from the first stage synchronously drives a nonlinear process in the second stage.
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申请公布号 |
US2005012983(A1) |
申请公布日期 |
2005.01.20 |
申请号 |
US20040914260 |
申请日期 |
2004.08.09 |
申请人 |
PIRELLI CAVI E SISTEMI S.P.A. |
发明人 |
PAROLARI PAOLA;MARAZZI LUCIA |
分类号 |
G02F1/35;G02F2/00;(IPC1-7):G02F1/35 |
主分类号 |
G02F1/35 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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