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Published April 1, 2019 | Submitted
Journal Article Open

Directly pumped 10  GHz microcomb modules from low-power diode lasers


Soliton microcombs offer the prospect of advanced optical metrology and timing systems in compact form factors. In these applications, the pumping of microcombs directly from a semiconductor laser without amplification or triggering components is desirable to reduce system power and to simplify system design. At the same time, low-repetition-rate microcombs are required in many comb applications as an interface to detectors and electronics, but their increased mode volume makes them challenging to pump at low power. Here 10 GHz repetition rate soliton microcombs are directly pumped by low-power (<20  mW) diode lasers. High-Q silica microresonators are used for this low-power operation and are packaged into fiber-connectorized modules that feature temperature control for improved long-term frequency stability.

Additional Information

© 2019 Optical Society of America. Received 24 January 2019; revised 19 February 2019; accepted 19 February 2019; posted 20 February 2019 (Doc. ID 358599); published 1 April 2019. Funding: Defense Advanced Research Projects Agency (DARPA) Atomic Clocks with Enhanced Stability (HR0011-16-C-0118); Kavli Foundation. The views, opinions, and/or findings expressed are those of the authors and should not be interpreted as representing the official views or policies of the Department of Defense or the U.S. Government. This Letter is also supported by the Kavli Nanoscience Institute. This material is based upon work supported by the Defense Advanced Projects Research Agency (DARPA) under Contract No. HR0011-16-C-0118. Distribution Statement "A" (Approved for Public Release, Distribution Unlimited). Additional support from the Kavli Foundation.

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