The 2-μm wavelength range has emerged as a low-loss and low-latency optical transmission window when using hollow-core photonic band gap fiber (HC-PBGF) and high-gain thulium-doped fiber amplifiers (TDFA). Various single and multichannel transmission experiments at these wavelengths have been implemented using directly modulated lasers and LiNbO3-based modulators. Here, we report the transmission performance of an externally modulated 4 × 10 Gb/s NRZ-OOK WDM signal over 1.15 km of low-loss HC-PBGF employing an InP-based Mach-Zehnder modulator (MZM) in the transmitter for the first time. An OSNR of 25 dB on 100-GHz spaced channels is required using a direct detection scheme. Furthermore, we demonstrate the lowest Vπ InP-based MZM operating at 2 μm by increasing the electro-optical overlap in the optical waveguide. The peak-peak modulation voltage is reduced significantly from 4 to 2.7 V with an electro-optic bandwidth of 9 GHz.
CITATION STYLE
Sadiq, M. U., Zhang, H., O’Callaghan, J., Roycroft, B., Kavanagh, N., Thomas, K., … Corbett, B. (2016). 40 Gb/s WDM Transmission over 1.15-km HC-PBGF Using an InP-Based Mach-Zehnder Modulator at 2 μm. Journal of Lightwave Technology, 34(8), 1706–1711. https://doi.org/10.1109/JLT.2015.2508941
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