1. Tbit/s Optical Data Transmission
Marc Schneider

2. Optical Data Transmission
Dr.-Ing. Marc Schneider - Tb/s Optical Data Transmission

3. OpSIS pn-Modulators RF-characteristics: 18 GHz 3dB cut-off frequency
Dr.-Ing. Marc Schneider - Tb/s Optical Data Transmission

4. OpSIS pn-Modulators
Characterization of pn-modulators for T = 230…350 K
Temperature shift induces constant phase offset
Modulation characteristic is not affected
Dr.-Ing. Marc Schneider - Tb/s Optical Data Transmission

5. Echelle Gratings Poster at TWEPP 2015 in Lisbon, Portugal
(already shown here)
45 channel Echelle grating
24 channels in measurement range
Good channel separation
Low loss
Poster at TWEPP 2015 in Lisbon, Portugal
proceedings in JINST
Dr.-Ing. Marc Schneider - Tb/s Optical Data Transmission

6. SOH-Modulators
Combination of silicon waveguides with electro-optic organic cladding materials
Large bandwidth, high efficiency and low energy consumption
Low yield: several steps necessary to produce a working modulator
R. Palmer et al., IEEE Photon. Technol. Lett. 25, 1226 (2013)
10 GHz
Dr.-Ing. Marc Schneider - Tb/s Optical Data Transmission

7. SOH-Modulators Modulators with 160 nm slots work nice and uniform …
Dr.-Ing. Marc Schneider - Tb/s Optical Data Transmission

8. SOH-Modulators Echelle gratings ok
1529 nm
1536 nm
1543 nm
Echelle gratings ok
But: absolute wavelengths of the channels shifted -24 nm from design
For a demonstrator suitable laser diodes required (≈3500€) or other expensive components (tunable filters, splitters/combiners, …)
Dr.-Ing. Marc Schneider - Tb/s Optical Data Transmission

9. Fiber-chip coupling
Vertical coupling with planar alignment is achieved by polishing the fiber end facet
Angle is chosen to provide for total internal reflection at fiber facet
B. Snyder et al., IEEE Trans. Compon. Packag. Manuf. Technol. 3, 954 (2013)
Fiber ground and polished on a grinding machine at IPE (KIT)
Dr.-Ing. Marc Schneider - Tb/s Optical Data Transmission

10. Demonstrators
Currently working towards 4 channel and 16 channel demonstrators
Open questions (two of many):
Which standards required?
Which standards to test against?
Dr.-Ing. Marc Schneider - Tb/s Optical Data Transmission