Firm:

          

Physical Sciences, Inc.

          

   

Address:

          

20 New England Business Center , Andover, MA 01810 - 1077

          

   

Phone:

          

(978) 689-0003                                                                                                                                                                                

          

   

Name:

          

Board of Trustees of the University of Illinois (at Urbana-Champaign)

          

   

Address:

          

SPA, 1901 S. First Street, Suite A, IL 61820 - 7406

          

   

Phone:

          

(217) 333-2187                                                                                                                                                                                

          

   

Name:

          

Dr. Christopher Evans

          

   

E-mail:

          

cevans@psicorp.com

          

   

Address:

          

20 New England Business Center, MA 01810 - 1077

          

   

Phone:

          

(978) 738-8159                                                                                                                                                                                

          

   

Name:

          

Dr. William Marinelli

          

   

E-mail:

          

marinelli@psicorp.com

          

   

Address:

          

20 New England Business Center , MA 01810 - 1077

          

   

Phone:

          

(978) 738-8226                                                                                                                                                                                

          

   

Estimated Technology Readiness Level (TRL) :                                                                                                                                                          
Begin: 2
End: 4

          

          

     

Technical Abstract (Limit 2000 characters, approximately 200 words):

Within this program, Physical Sciences Inc. (PSI) and the University of Illinois Urbana-Champaign (UIUC) will develop Photonic Integrated Circuit Assisted-Single Photon Detectors (PICA-SPDs) to increase the bandwidth and timing resolution of single-photon detectors (SPDs). Realizing low size, weight, and power (SWaP) SPDs with high saturation-rates and high timing-resolutions are critical for deploying of quantum technology in space. While the best superconducting nanowire SPDs (SNSPDs) can achieve saturation rates up to 100 MHz with timing resolutions of several 10’s of ps, these also require cryogenic environments, making their deployment in space a challenge. On the other hand, single photon avalanche photodiodes (SPADs) are low SWaP and can operate at room temperature with good efficiencies (>75%); however, the timing resolution is often 50 ps (or more) and the saturation rate is typically limited to 10s of MHz.

To overcome the challenge of increasing both the timing resolution and saturation rate of SPAD arrays, our unique active-approach leverages high-speed, low-loss PIC modulators. Here, single-photon optical signals enter the PIC and are routed to a series of Mach-Zehnder Interferometer (MZI) switches. These fast, traveling-wave switches are driven by periodic signals having progressively higher frequencies to create a switch yard. As the photon stream enters each of the MZI switches, the different time-positions are routed to different outputs of each MZI, which isolates individual time-positions to enable readout using an array of SPDs. This approach enables an array of SPADs to operate together to achieve timing resolutions even surpassing SNSPDs with greatly enhanced saturation count rates to enable space-based quantum networking applications.

          

          

     

Potential NASA Applications (Limit 1500 characters, approximately 150 words):

The development of quantum communications and networks are a key technology to enable secure communication, sensor arrays, and quantum computer networks. Our proposed technology will allow NASA to increase the bandwidth of both free-space and fiber quantum links.

          

          

     

Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words):

High saturation rate, low-jitter single-photon detectors are a general-purpose tool for a range of applications, from quantum networks and communication links, to imaging and healthcare applications.

          

          

     

Duration:     13