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Work Elements

Wavy Abstract Background

1

Access networks and mobile fronthaul

  • IIT Madras (IITM), in collaboration with M/s SingalChip and Signaltron proposes to develop a complete transponder that would work at 28 Gbaud, with OOK and PAM4, and with four wavelengths, to achieve a data rate of > 200 Gbps.

  • IIT Madras, in collaboration with Sterlite Technologies Ltd and SFO Technologies Ltd, proposes to build the complete optical ecosystem for a multicore fiber link both in the laboratory and in field deployment. NavTech has also expressed interest in participating in this effort.

  • IIT Delhi (IITD) proposes to develop a convergent and fully flexible radio over fiber network with 10 Gb/s per cell.

  • IITM in collaboration with the 5G testbed of IITM will demonstrate the optical generation and transport of mm wave (26 GHz) signals in a four-channel MIMO system, that minimizes the bandwidth utilization. A hybrid radio over fiber link between the DU-RU with minimal bandwidth (< 200 MHz occupied bandwidth) in the 5G test-bed of IITM. The design would be packaged in collaboration with SFO Technologies.
    SFO and Sasmos will develop RoF and WDM RoF links respectively to test in this as well as in the multicore field deployment of aerial cables.

  • IITD will develop a convergent and fully flexible radio over fiber network with 10 Gb/s per cell.

2

Metro and Long Haul links

  • IITM plans to upgrade the existing 100 Gbps testbed for higher-capacity transmitter and offline receiver using optimal higher order modulations and digital signal processing, and to test wavelengths in both C and L bands​​. 

  • IITM proposes to demonstrate a DSP-free dispersion compensation for 1 Tbps/wavelength over four spans (80 km each) using optical mid-span inverters. The inverters would be packaged in collaboration with SFO Technologies and will be tested in field in collaboration with Tata Comm/BSNL.

  • IITM proposes to demonstrate low noise optical amplifiers for increasing the reach of classical and quantum networks ; gain of at least 10 dB and Noise Figure of 3 dB.

  • IITD aims to design a testbed to achieve 20 wavelengths x100 Gbps, resulting in a total bit rate of 2 Tbps, with external cavity lasers. The capacity will be tested with a custom-built frequency comb that generates multiple wavelengths.

  • IITD will also develop broadly reconfigurable optical filters and related components for carrier filtering, coherent applications, and a self-tracking filter. They will also develop machine learning and digital signal processing (DSP) algorithms for nonlinearity compensation and fiber fault detection.
     

3

Free space Optical Links and LiFi

  • IIT Delhi (in support of NavTech) targets the development of 40 Gb/s FSOC links with a reach larger than 20 km. For this, mitigating the effects of turbulence remains paramount. Thus, IITD will undertake the simulation study of vector beam propagation through turbulence under realistic beam parameter and turbulence conditions, Lab testing of two beam engineering designs for suitability of future deployment with real FSOC systems, development of forward error correction for FSO systems in FPGA and development of preliminary automatic tracking system

  • IITD (in collaboration with NavTech) will develop solutions over white LEDs at 200 Mb/s, backhauling architecture of the LiFi network, which can distribute Internet data across LiFi devices, control plane and MAC layer of LiFi systems, propose novel solutions to increase the coverage area of the cells by using MIMO/NOMA, develop handover schemes to support seamless networking, etc.

4

Quantum security

  • ERNET plans to establish an additional node to the already existing MAQAN Network, in collaboration with IITM and monitor and manage the quantum network.

  • IITM in collaboration with Quanfluence plans to develop an indigenous coherent homodyne receiver and low noise chip based amplifiers to be specifically used for CV QKD systems and satellite communication systems.

  • CDoT plans to establish a Quantum Key Distribution system for quantum security of the classical network.
     

5

Optical Network Testbed

  • Sterlite installs multi-core and single-core fiber at IITM, for underground and arial scenarios. 

  • IITM plans to test use the multi-core fiber installations for testing analog and digital optical technologies  

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