Author Affiliations
State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Key Laboratory of Navigation and Location Services, Shanghai Institute for Advanced Communication and Data Science, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, Chinashow less
Fig. 1. Schematic structures of (a) the TDM interleavers in parallel and serial configurations, (b) the WDM interleaver, and (c) the MDM interleaver.
Fig. 2. (a) Schematic structure of a wavelength-mode interleaved photonic signal processing system. (b) The structure of the wavelength demultiplexer based on two-stage cascaded Mach–Zehnder interferometers. (c) The structure of the mode converter and multiplexer.
Fig. 3. (a) Optical microscope image of the fabricated chip. (b) A photo of the packaged chip with fiber array coupling and electrical wire-bonding to a PCB.
Fig. 4. (a) The transmission spectra of the wavelength demultiplexer. (b) The transmission spectrum of the wavelength-division interleaver. (c) (left) The optical pulse waveforms at the end of the wavelength-division interleaver. (right) The delay error of the optical pulses. The red color indicates the measured pulses and the green color indicates the ideal pulses with a time interval of 250 ps.
Fig. 5. (a) The transmission spectra from output ports , , , and through mode transmission in the multimode waveguide. (b) The transmission spectra from output ports , , , and through mode transmission in the multimode waveguide. (c) (left) The optical pulse waveforms at the end of the wavelength-mode-division interleaver. Dotted curves: the optical pulse through the mode; solid curves: the optical pulse through the mode. (right) The delay error of the optical pulses. The red color indicates the measured pulses and the green color indicates the ideal pulses with a time interval of 125 ps.
Multiplexing methods | Integration platform | Account of channels | Delay step (ps) | Delay error (%) | Intrinsic loss* (dB) |
---|
Parallel-TDM[9] | Silicon | 8 | 25 | – | 9 | Serial-TDM[12] | Silica | | 100 | – | 12 | Serial-TDM[26] | InP | | 3.1 | – | 6 | Serial-TDM[25] | Silicon | | 10 | – | 3 | WDM[3] | Silicon | 4 | 253.8 | 0.35 | 0 | WDM+MDM | Our work | 8 | 125 | 3.2 | 0 |
|
Table 1. Performance Comparison of Several Typical Integrated Pulse Interleavers