Quantum sensors consortium Cold atoms group 30122020 Cold

Quantum sensors consortium – Cold atoms group 30/12/2020 Cold atoms clock – block diagram Optics module Atomic modulecold atoms electronic modules & control Our Target: development of an industrial compact atomic module for cold atom sensors (To fit 3 Ux 19” product) 1 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited. 2/1/2022

Atomic module A 6. 2 Atomic module- cold atoms Sensing imaging module Physics module Chamber assembly MW/Quad assembly BGU C-field assembly Pyramid assembly Magnetic shielding Light in fiber from Civan Assembled here 2 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited. Rb source CSTM

Physics module- status Waiting for QC Magnetic shielding C-field assembly 4 samples have passed QC Pyramid assembly Rb source Resonance was shifted to right place but field homogeniety was not preserved All components are here 3 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited. MW/Quad assembly Chamber

Cooling sensing module- status Refracting elements Fiber interface and collimator Optical bench Pyramid holder Detection assembly Connection to cell • We have started working on Submodule assembly • Collimator was assembled and examined using Shearing interferrometer 4 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited.

Collimator Examination CMOS camera NOT Collimated Screen Shearing interferometer 5 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited. collimator Fiber in

Quantum sensors consortium – Lasers & optics group 30/12/2020 Cold atoms clock – block diagram Optics module Atomic modulecold atoms electronic modules & control Our Target: development of an industrial compact optics module for cold atom sensors (To fit 3 Ux 19” product) Status: ÷ Feasibility experiments were done ÷ Optical design and Mechanical design are in process ÷ LLI purchasing was done ÷ Interface configuration was done ÷ PDR in 1 month 6 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited. 2/1/2022

Optical module architectures Block Diagram #1 I/O list # Symbol Description 1 IHR Heater Reference cell current 2 IHS Heater Signal cell current 3 ITC-RP Repumper laser Case TEC current 4 ITL-RP Repumper laser chip TEC current 5 IL-RP Repumper laser Injection current 6 ITC-CL Cooler laser Case TEC current 7 ITL-CL Cooler laser chip TEC current 8 IL-CL Cooler laser Injection current 9 TL-RP Repumper laser temperature read 10 TC-RP Repumper case temperature read 11 TL-CL Cooler laser temperature read 12 TC-CL Cooler case temperature read 13 VAT A 6. 1. 7 attenuator control 14 TS Signal cell temperature read 15 TR Reference cell temperature read 16 VSA Amplified spectroscopy signal 17 VBA Amplified Beat note signal 18 RP-SWCTRL Repumper switch control (TTL) 19 CL-SWCTRL Cooler switch control (TTL) Yellow bricks – Submodules made by Civan Green bricks – Purchased components 7 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited.

LASER SUBMODULE (A 6. 1. 1/2) OPTICAL DESIGN Beam divergence from laser: =8 =21 Elliptical Beam Cylindrical beam expander is used Nominal Coupling efficiency > 95% This presentation contains Confidential Proprietary Civan Advanced Information Technologies Ltd. Proprietary Confidential. 2008 -2020 to Accu. Beat Ltd. Distributionand is prohibited. Page 8

LASER SUBMODULE (A 6. 1. 1/2) OPTICAL DESIGN Fiber Cylindrical Beam Expander XZ Cross section Collimator Focuser LD YZ Cross section 1. 94 mm 16 mm 40 mm This presentation contains Confidential Proprietary Civan Advanced Information Technologies Ltd. Proprietary Confidential. 2008 -2020 to Accu. Beat Ltd. Distributionand is prohibited. Page 9

SPECTROSCOPY SUBMODULE (A 6. 1. 3) DESIGN This presentation contains Confidential Proprietary Civan Advanced Information Technologies Ltd. Proprietary Confidential. 2008 -2020 to Accu. Beat Ltd. Distributionand is prohibited. Page 10

SPECTROSCOPY SUBMODULE (A 6. 1. 3) DESIGN COLLIMATED BEAM Collimated beam: 3 w=2 mm Full beam divergence (3 w): 0. 8 m. Rad This presentation contains Confidential Proprietary Civan Advanced Information Technologies Ltd. Proprietary Confidential. 2008 -2020 to Accu. Beat Ltd. Distributionand is prohibited. Page 11

IN FIBER COMPONENTS Isolator: 30 d. B isolation; 1 d. B Loss Fused Fiber coupler: 0. 6 d. B Loss Switch: 1. 7 d. B Loss; 50 d. B Attenuation; 1 ms rise time VOA: 2 d. B Loss This presentation contains Confidential Proprietary Civan Advanced Information Technologies Ltd. Proprietary Confidential. 2008 -2020 to Accu. Beat Ltd. Distributionand is prohibited. Page 12

IN FIBER COMPONENTS Risks • Intensity fluctuations at the output due to mechanical vibrations (Especially in the long term) or Temperature variation. • Polarization rotation over time or due to Temperature variation • For Active compenents (Switches): Fluctuations from pulse to pulse Risk reduction plan • Examination of the intensity and polarization stability of passive components. Due to the long lead time of such components we have used 1064 elelments that are already inhouse. This presentation contains Confidential Proprietary Civan Advanced Information Technologies Ltd. Proprietary Confidential. 2008 -2020 to Accu. Beat Ltd. Distributionand is prohibited. Page 13

MEASUREMENT SETUP IPS diode laser 1064 nm SM Out put Coupler 50/50 APC connectors Isolator Coupler 50/50 Tap 99/1 Reference This presentation contains Confidential Proprietary Civan Advanced Information Technologies Ltd. Proprietary Confidential. 2008 -2020 to Accu. Beat Ltd. Distributionand is prohibited. Page 14

LONG TERM AMPLITUDE STABILITY – 1 HZ Even with 2 questionable areas RMS is under 0. 25% per day Ratio Reference Output 0. 01 This presentation contains Confidential Proprietary Civan Advanced Information Technologies Ltd. Proprietary Confidential. 2008 -2020 to Accu. Beat Ltd. Distributionand is prohibited. Page 15

Electronic / RF group - Accu. Beat Cold atoms clock – block diagram Optics module 16 Atomic modulecold atoms This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited. electronic modules & control 2/1/2022

Considerations • Architecture: switched low frequency with high frequency combining to create 6. 834 GHz RF signal , with fine tuning capabilities, for Atoms frequency resonation 17 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited.

High end (Default) implementation. Using DRO • 18 DRO better guarantees the quality, stability and phase noise performance. The DRO to be locked on the external reference This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited.

Actual low cost Evaluation diagram • 19 Currently under test is a low cost implementation of the architecture, which includes low phase noise high frequency PLL and high resolution, low frequency DDS. This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited.

AD 9912 DDS EVB under tests Worked only with high frequency reference. 20 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited.

AD 5610 SYNTH EVB under tests 21 Frequency offset @100 Hz @1 KHz @100 k. Hz Measured Phase noise for 6. 6 GHz [d. Bc/Hz] TBD -82. 75 -94. 61 -114. 48 Datasheet Phase noise for 8 GHz [d. Bc/Hz] -92 -102 -110 -112 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited.

Status • Currently testing evaluation boards of the updated building block before their re-integration to a RF chain. • • • 22 Currently under test is a cost effective ADF 5610 PLL synthesizer with an integrated VCO which should meet RF requirements • Previous under tests RF synth disqualified • The DUT doesn’t meet the expected results. Full report prepared for its tests and to be submitted to Analog Devices for further evaluation and support. DDS AD 9912 is under tests and showing good stability. Yet to meet exact expected results in the desired frequencies. • Full report prepared for its tests and to be submitted to Analog Devices for further evaluation and support A backup PL-DRO devices was identified for possible future evaluation to reference the RF chain performance and tests. This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited.

Thank you 23 This presentation contains Confidential Proprietary Information to Accu. Beat Ltd. Distribution is prohibited.