Abstract
We report an integrated photon pair source based on a CMOS-compatible microring resonator that generates multiple, simultaneous, and independent photon pairs at different wavelengths in a frequency comb compatible with fiber communication wavelength division multiplexing channels (200 GHz channel separation) and with a linewidth that is compatible with quantum memories (110 MHz). It operates in a self-locked pump configuration, avoiding the need for active stabilization, making it extremely robust even at very low power levels.
Highlights
With the realization of commercial solutions for quantum cryptography, research on integrated sources of entangled and single photons has been a hot topic in photonics in recent years
In order to avoid the use of an external pump laser, we exploit a scheme we recently introduced in the context of a classical optical parametric oscillator (OPO) [30] that consists in embedding the microring in an external active cavity [Fig. 1(a)]
For each signal-idler channel pair we evaluated the coincidence to accidental ratio (CAR) following the procedure described by Engin et al [18]
Summary
With the realization of commercial solutions for quantum cryptography, research on integrated sources of entangled and single photons has been a hot topic in photonics in recent years. Practical long-distance quantum key distribution (QKD) [13], as well as quantum networks in general [14], and other applications such as information storage during quantum computation [15], will require quantum repeaters and memories These devices are typically based on atomic transitions that have linewidths on the order of 10 to 100 MHz [13]. It features linewidths that are orders of magnitude narrower than previous sources based on integrated ring resonators, and that are compatible with atomic-based quantum memories It employs a self-locked pumping scheme that does not require an external pump laser, and any active stabilization. All together these features potentially mark a substantial step forward to achieve stable, integrated and CMOS-compatible photon pair sources for quantum optical applications
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
