We review our recent exploratory investigations on mode division multiplexing using hollow-core photonic bandgap fibers (HC-PBGFs). Compared with traditional multimode fibers, HC-PBGFs have several attractive features such as ultra-low nonlinearities, low-loss transmission window around 2 µm etc. After having discussed the potential and challenges of using HC-PBGFs as transmission fibers for mode multiplexing applications, we will report a number of recent proof-of-concept results obtained in our group using direct detection receivers. The first one is the transmission of two 10.7 Gbit/s non-return to zero (NRZ) data signals over a 30 m 7-cell HC-PBGF using the offset mode launching method. In another experiment, a short piece of 19-cell HC-PBGF was used to transmit two 20 Gbit/s NRZ channels using a spatial light modulator for precise mode excitation. Bit-error-ratio (BER) performances below the forward-error-correction (FEC) threshold limit (3.3×10−3) are confirmed for both data channels when they propagate simultaneously.
|Title of host publication||2013 15th International Conference on Transparent Optical Networks (ICTON)|
|Number of pages||8|
|Publication status||Published - 2013|
|Event||15th International Conference on Transparent Optical Networks (ICTON) - Cartagena, Spain|
Duration: 23 Jun 2013 → 27 Jun 2013
|Conference||15th International Conference on Transparent Optical Networks (ICTON)|
|Period||23/06/2013 → 27/06/2013|