Multi-Wavelength and Built-in Test Capable Local Area Network Node Packaging
This program targets the development of an integrated cross-cube optical WDM node for avionic applications. The device incorporates four quad WDM receivers (16 receive channels total) cross-coupled to four quad WDM transmitters (16 transmit channels total), with each data path operating at 56Gbps employing PAM4 modulation. The device enables an optical network backbone that does not rely on a lossy passive optical star coupler and incorporates Built-In Test capability, thus significantly improving signal routing and distribution throughput and reliability. Previous efforts have realized the quad transmitter assembly operating at 10Gbps and tunable filter technology suitable for integration into the receiver front-end. Current activity is aligned with development of the laser transmitter capable of achieving 56Gbps PAM4 transmission
Rugged, Uncooled Monolithic Analog Optical Transmitter at 1 um
In this program, Freedom Photonics will develop a monolithically-integrated, externally-modulated, 1000 nm laser for analog transmission applications. Applications include EW, antenna remoting, and ISR, for avionic platforms and systems. The transmitter is based on an innovative low-linewidth, low-RIN, high-power semiconductor laser, monolithically integrated with a high-performance semiconductor modulator: no such device commercially exists today. Implementation is in the GaAs material system, enabling high-efficiency performance and un-cooled operation in elevated military temperature environments, significantly reducing SWaP. Prior demonstrations of high-efficiency GaAs based semiconductor lasers have been made, with additional effort required to monolithically integrate the modulator. Further technology maturation efforts are needed, in addition to collaboration with defense partners/end users to tailor the transmitter towards specific system-level target applications.
This program targets a photonic analog to feature converter based on optical speckle. This targets electronic warfare applications including compressive sensing, electro-magnetic (EM) spectral awareness, RADAR/Light Detection and Ranging (LIDAR), and other applications that need to identify features in a large information bandwidth. The developed innovation builds on existing compressive sensing algorithms but which incorporates a unique enabling component in the utilization of optical speckle processing, which has the potential for low-power photonic integration. A redesign of the previously developed system based on discrete components to allow photonic integration has been performed. The redesigned system has been validated. The next step will be to push the technology towards further integration and maturity, and to tailor the system towards specific target applications to be defined in collaboration with defense partners/end users.