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Signal penalties induced by different types of optical filters in 100 Gbps PM-DQPSK based optical networks

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Academic year: 2020

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Fig. 1.  Moreover, it will become narrower if the center  frequencies of individual cascaded filters are not aligned  perfectly
Fig. 2. (a)  A m p l i t u d e  t r a n s f e r  f u n c t i o n of  f o u r  k i n d s of filters; (b)  p h a s e  t r a n s f e r  f u n c t i o n of  f o u r  k i n d s of filters
Fig. 7. EOP as a  f u n c t i o n of  c a s c a d e d filters  i n  t h e 100  G b p s PM-NRZ-DQPSK  s y s t e m  w i t h (a) all  t h e filters'  c e n t e r  f r e q u e n c y  a l i g n e d  a n d (b) filters'  c e n t e r  f r e q u e n c y  m i s a l
Fig. 7  shows filter concatenation effect induced signal  impairments in frequency domain (signal spectrum) and  time domain (eye diagram)
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