We report on a multifunctional active demultiplexer for optical frequency combs. The proposed technique, based
on injection locking, combines the functionality of a tunable demultiplexer, gain equalizer and an optical
amplifer, all in one device. Validation of the concept is experimentally demonstrated through simultaneous
demultiplexing and amplifcation of combs with various free spectral ranges (2.5 to 15 GHz), achieving an
adjacent channel suppression ratio > 35 dB and an output power of 7.5 dBm. The functionality of the demultiplexer is extended to that of a gain equalizer, by fltering comb tones with powers 10 dB below the spectral
peak, whilst maintaining a suppression ratio > 30 dB and a constant output power. This feature increases the
number of comb lines suited for data modulation (i.e. usable lines), by a factor of ~1.7. Finally, we test the
stability of such a demultiplexer, by measuring the frequency drift, beat tone power variations and phase correlation between demultiplexed tones.
Science Foundation Ireland (SFI) 15/CDA/3640. Financial support by SFI 17/IFB/5385, the SFI/European Regional Development Fund (13/RC/2077) and DT2018 0268
ID Code:
27067
Deposited On:
26 Apr 2022 14:41 by
Pascal Landais
. Last Modified 22 Aug 2022 16:03