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HyperLight Demonstrates the Industry-First Hybrid Integrated Transmitter With a DFB Laser on Thin-Film Lithium Niobate Platform

Integrated thin-film lithium niobate photonics has emerged as a powerful platform for realization of high-performance chip-scale optical systems

CAMBRIDGE, Mass.–(BUSINESS WIRE)–#PIC–HyperLight, a leader in the commercialization of thin-film lithium niobate photonic integrated circuits for datacom, telecom, analog, and quantum applications, announced today that it has successfully demonstrated, together with collaborators from Harvard University and Freedom Photonics, a breakthrough process of integrating high-power lasers on thin-film lithium niobate platform. The said hybrid platform enabled the first high optical power transmitter chip consisting of an electrically pumped DFB laser integrated with HyperLight’s high-speed thin-film lithium niobate intensity modulator capable of operating at 60 mW output power and beyond 50 GHz electro-optic bandwidth.

Photonics is a vital technology engine needed to keep the world connected. The integration of optical components and other functions into a large-scale photonic integrated circuits are critical in enabling next-generation digital and analog communication applications by reducing the total components cost. The cost is reduced by using fewer discrete parts, less packaging and assembly steps, and lower power consumption. The commonly used integrated photonics platforms based on materials such as silicon and indium phosphide have not been able to meet the power, cost, and performance requirements of components and network providers due to the intrinsic limitations of the material. Thin-film lithium niobate, due to its superior optical material properties, has emerged as an ideal photonics platform for the realization of high-performance chip-scale optical systems.

In this industry-first demonstration, HyperLight and its collaborators from Harvard University and Freedom Photonics used DFB lasers for integration with thin-film lithium niobate because of their low cost, small footprint, and large output powers exceeding 100 mW. Using only passive-alignment and flip-chip thermo-compressive bonding, the DFB lasers emitted approximately 60 mW (17.8 dBm) of optical power into the thin-film lithium niobate waveguides. This will enable new architecture such as large arrays of high-power transmitters as well as unprecedented performance in optical links.

“We are very excited to be a part of this remarkable demonstration of the hybrid integration capability of the thin-film lithium niobate platform with other critical optical components,” said Mian Zhang, co-author, CEO of HyperLight. “The traditional bulk lithium niobate solutions are widely deployed but are limited in performance and applications due to the lack of integration. Our miniaturized thin film integrated solution combines the superior proven material property of lithium niobate with scalable silicon semiconductor processes at low cost. Hybrid integration of key active high-performance components such as DFB lasers with thin film lithium niobate results in best in class performance combined with low cost which opens up a lot of possibilities for those innovators who are looking into lower power consumption and lower cost solutions for optical networks beyond 800G and 1.6Tb/s.”

The results of the above demonstration are described in a manuscript by Amirhassan Shams-Ansari, et. al. entitled, “Electrically pumped high power laser transmitter integrated on thin-film lithium niobate,” (https://arxiv.org/abs/2111.08473). This effort is part of a DARPA funded program Lasers for Universal Microscale Optical Systems (LUMOS) which aims to bring high performance lasers and amplifiers to manufacturable photonics platforms through heterogeneous integration of diverse materials. To learn more about HyperLight’s technology, visit www.hyperlightcorp.com.

About HyperLight

HyperLight designs and produces photonic integrated circuits (PICs) with ultrahigh electro-optic performances to provide solutions for next generation optical communication and signal processing applications. The company’s ultrahigh speed, low power, and integrated thin-film lithium niobate electro-optic solutions enable customers to achieve unprecedented system level performances in their applications.

For more information, visit www.hyperlightcorp.com.

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