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现代光电子学(2)

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国家自然科学基金委员会<br />

数理学部实验物理讲习班<br />

脉冲经过色散介质:<br />

L<br />

dispersive<br />

media<br />

ω<br />

1<br />

k( ω) n( ω) k k ( ω ω ) k ( ω ω )<br />

c<br />

2<br />

2<br />

= = 0 + 1 − 0 + 2 − 0 +L<br />

k = k( ω ) 是光脉冲平均的波数<br />

k<br />

k<br />

0 0<br />

1<br />

dk 1 ng<br />

= = =<br />

d v c<br />

ω ω= ω<br />

2 2<br />

0<br />

0<br />

g<br />

2<br />

dk d(1/ vg) 1 dng<br />

= = = 群速的色散参数<br />

dω dω cdω<br />

(GVD parameter)<br />

ω= ω

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