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Solicitation #: N00173-20-RFI-CY01 Procurement Type: Sources Sought Title: Rydberg Rb with Difference Frequency Comb Lock Laser System – Request for Information NAICS: 334516 – Analytical Laboratory I... Solicitation #: N00173-20-RFI-CY01 Procurement Type: Sources Sought Title: Rydberg Rb with Difference Frequency Comb Lock Laser System – Request for Information NAICS: 334516 – Analytical Laboratory Instrument Manufacturing Classification Code: 58 – Communication, detection, and coherent radiation equipment Response Date: 20 December 2019 Primary Point of Contact: Courtney Williams, Contract Specialist, courtney.williams@nrl.navy.mil Description: This Request for Information (RFI) is for planning purposes only and shall not be considered as an invitation for bid, request for quotation, request for proposal, or as an obligation on the part of the Government to acquire any products or services. Your response to this RFI will be treated as information only. No entitlement to payment of direct or indirect costs or charges by the Government will arise as a result of contractor submission of responses to this announcement or the Government use of such information. This request does not constitute a solicitation for proposals or the authority to enter into negotiations to award a contract. No funds have currently been authorized, appropriated, or received for this effort. The information provided may be used in developing its acquisition strategy, or performance work statements, or performance specifications. Interested parties are responsible for adequately marking proprietary or competition sensitive information contained in their response. The Government does not intend to award a contract on the basis of this RFI or to otherwise pay for the information submitted in response to this RFI. Objective: The NRL is inquiring for potential sources that are capable of providing the following: Rydberg Rb with Difference Frequency Comb Lock Laser System NRL Code 5613 is requiring a complete, turn-key, stabilized laser system that will allow us to transition our recent quantum memory experiments towards a more scalable and versatile configuration with the use of Rydberg states. This system must include high power, single mode, narrow bandwidth laser tunable from 473 to 481 nm stabilized to an intrinsically stable frequency comb (i.e. with inherently stabilized fCEO and carrier envelope phase) that allows fast tuning and very precise locking of the laser wavelength to either desired Rydberg transition or arbitrary wavelengths with few hundred kilohertz linewidths. This turn-key system must contain all necessary control electronics for driving CW laser, perform CW laser locks, and include wavelength meter, digital counter, oscilloscopes etc. Additionally, the system will include wavelength extensions to enable locking of other lasers already in possession of NRL Code 5613: 780nm with bandwidth at least 50nm, telecom wavelengths (1300-1600nm). The system will be assembled and characterized at the factory to verify specifications of the complete system. It will be shipped and reassembled to working order at NRL site and include on-site training. The complete unit will provide controls for all locks, system parameters and diagnostics from a computer GUI and the parameters must be accessible with external commands so that the system can be utilized in an experimental sequence suitable to operate a quantum memory. Laser specification (CW frequency doubled laser at 480nm), qnty: 1 CW frequency doubled (SHG) laser with 800 mW output power at the wavelengths of 473-481 nm Output power at least 800 mW Coarse tuning of 8 nm over 473—481 nm, with mode hop-free tuning greater than 15 GHz Linewidth less than 100 kHz Full digital control via touchscreen, PC GUI or command language, and analog remote control and monitoring Output power stabilization Beam shaping of SHG output with nearly diffraction limited beam profile Probe beam output at fundamental wavelength Available TA beam output at fundamental wavelength High quality digital Pound-Drever-Hall stabilization of SHG resonator length with automatic relocking to the correct resonator mode, lock bandwidth 30 kHz Automatic optimization of fundamental beams into TA and SHG stage Automatic optimization and stabilization of fiber-coupled SHG output Air sealed frequency doubling resonator Beam steering to resonator, crystal and resonator mirrors can be adjusted without opening the laser High quality optical isolators to protect the master laser and the tapered amplifier Ability for fast frequency modulation of master laser (with protective circuit for laser diode) Frequency Comb Specification (Difference Frequency Comb), qnty: 1 (with extension modules) Intrinsically stable frequency comb with passive, all-optical phase-lock, which inherently stabilizes fCEO and the carrier envelope phase. Three wavelength extensions included (1475 nm, 780/795 nm and 960 nm) 4 fCEO-free (offset-free) outputs at 1560 nm with power greater than 10 mW at each output Comb spacing 80 MHz Bandwidth greater than 20 nm at each output Stability (locked to RF reference): short-term at least 10-16 in 1 s, long-term 3×10-18 in 1000 s High bandwidth (DC – 10 MHz) for modulation of optical reference RMS phase stability better than 35 mrad in 20 s Wavelength extensions for non-linear conversion: Supercontinuum output centered at 1475 nm with at least 200 nm bandwidth NIR output at 780 nm with bandwidth >35 nm and output power at least 50 mW (to include 795 nm) Output centered at (or to include) 960 nm with bandwidth at least 40 nm Modular system allowing future upgrades with additional wavelength extensions at free outputs User software with remote access for system control, data acquisition and data analysis Live frequency measurement of CW laser Automatic calculation and plotting of Allan deviation Low noise RF reference at 800MHz with GPS frequency standard All optical connections between frequency comb, wavelength extensions, combiners, detectors, etc. have to be fiberized, all fibers and comb and laser beam combiners for all modules, detectors and filters have to be included Wavelength meter with measurement range 330 to 1180 nm and absolute accuracy sufficient for unambiguous determination of comb line order number. The wavelength meter must be capable of CW and pulsed laser measurement and must be fiber coupled. It must have an input for calibration laser and a stabilized HeNe-Laser must be included for calibration of the wavelength meter. Wavelength meter must have a computer interface and must be fully integrated into comb control software Control Electronics Control and locking electronics for the laser and frequency comb with beat-note detectors, counter and oscilloscope with spectrum analyzer High bandwidth (up to 45MHz) lock electronics for frep and lasers (qnty: 5) Phase-Frequency Detectors for wavelength extensions and comb (qnty: 5) Monochromatic detector with grating based adjustable filter (qnty: 5) Digital oscilloscopes with FFT spectrum analyzer for beat note monitoring from the software (qnty: 2) 4 cannel, dead-time free counter for input frequencies 5 – 50 MHz Integration specification The system has to be a turn-key system, meaning laser, optical frequency comb and all accessories are controlled from a central system or computer GUI where the laser parameters and locks can be implemented and diagnosed. The system has to be capable of 24h/7d operation within laboratory environment. The user interface has to feature an automatic lock of the comb to RF reference, remote locking of 480 nm laser and extension CW lasers. The system has to be capable of addressing Rb Rydberg states via a two-photon process, where first photon step uses either D1 or D2 line. This will include the ability of locking the Rb Rydberg laser and the D1 or D2 lasers to the optical frequency comb and setting an absolute frequency either with integrated wavelength meter or to an atomic transition, based on operator preference. As indicated in the frequency comb specification, the wavelength meter must be integrated into the system and must have absolute accuracy sufficient for unambiguous determination of comb line order number. Wavelength meter must have a computer interface and must be fully integrated into control software. The control electronics for locking and monitoring of the locks and laser parameters must be integrated into the system, including oscilloscopes, frequency analyzers and counters. Central control unit from a computerized central system or control GUI must: allow control of the optical frequency comb operation and provide diagnostics and status allow the full control of the laser, incl. locks, parameters and status allow control of the wavelength meter be capable of providing live frequency measurements of cw lasers provide automatic calculation and plotting of Allan deviation from logged data The laser system must be capable of working with lasers currently in possession of Code 5613, namely Toptica DL Pro and Toptica TA Pro lasers. This means that the frequency comb part of the system will be able to lock those lasers, operating at 780 nm, 795 nm and 1474 nm, and set the absolute frequency of those lasers. System must be fully integrated and characterized at factory, all laser locking PID parameters adjusted and optimized for locking and must be delivered to NRL site and set up to full working condition. In person, on-site training will be provided for the completed installed system. All the manuals, software and specifications for the laser, comb and integrated system, to include information on the design, overall layout and operation and troubleshooting techniques, will be provided. The NRL asks that interested parties, at a minimum, supply the following information: Contact Information Name of company, mailing address, and point of contact (POC) Telephone number, fax number, address, and e-mail address of POC Business size and number of employees If a small business identify if your firm is an 8(a), HUBZone, SDVOSB, WOSB If your company is a GSA schedule contract holder AND if the items are available under the schedule Submission of Information: All information and data received in response to this RFI marked or designated as corporate or proprietary information will be protected as such. Please include this notice number on all documents and email. Classified Material shall not be submitted. Please transmit responses by e-mail to Courtney Williams, Contract Specialist, at courtney.williams@nrl.navy.mil in either Microsoft Word or .pdf formats. All responses must be received on or before 3:00PM, (EST), 20 December 2019. Phone solicitations or emails regarding the status of this Request for Information (RFI) will not be accepted.