1333ND21QNB680247 SF-30 A002.pdf

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing items 8 and 15, and returning or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

E. IMPORTANT: Contractor is not is required to sign this document and return copies to the issuing office.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE

2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable)

7. ADMINISTERED BY (If other than Item 6) CODE

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended. is not extended.

12. ACCOUNTING AND APPROPRIATION DATA (If required) copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NUMBER AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NUMBER

IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15C. DATE SIGNED

15A. NAME AND TITLE OF SIGNER (Type or print)

16C. DATE SIGNED

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

PAGE OF PAGES

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

Previous edition unusable

TITLE: OPTICAL FREQUENCY COMB SYS/A002 QUESTION & ANSWER 2

CONTINUED ON THE NEXT PAGE.

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1333ND21QNB680247A002 JUN 08, 2021 NB688000-21-01692

000014

NATIONAL INST OF STDS AND TECHNOLOGY

325 BROADWAY

BOULDER CO 80305-3328

See Block 6

1333ND21QNB680247

JUN 02, 2021

See Schedule

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TITLE: OPTICAL FREQUENCY COMB SYS/A002 QUESTION & ANSWER 2

The purpose of this amendment is to amend a provision clause and post question and answers as follows:

CLAUSE 52.212-2 EVALUATION--COMMERCIAL ITEMS (OCT 2014) IS HEREBY

REPLACED IN ITS ENTIRETY.

QUESTION 1 Item #7.A): Is it permitted to substitute the 1156 nm laser reference with a 1060 or 1560 nm reference for verification of stability of frequency transfer to

698/871 nm, while making sure the 1156 nm supercontinuum light provides a power density > 20 nW/mode?

ANSWER: If the substitute reference laser utilizes exactly the same branch of the frequency comb system as the 1156 laser would, then this is permitted. Any small differences between use of the alternative reference laser wavelength compared to

1156 nm must also be rigorously estimated. If all of these conditions cannot be met, then it is not permitted.

QUESTION 2 Item #7. B): Is it sufficient to verify the frequency transfer stability from

1156 (or 1060/1560) to 698 nm only, while making sure 698/871 nm supercontinuum light provides a power density > 20 nW/mode?

ANSWER: If the 698 nm and 871 nm light were extracted from exactly the same branch of the frequency comb system, and the minimal differential path between the detection systems for the two colors was rigorously estimated to have negligible instability, then this would be sufficient. Otherwise, the frequency transfer instability must be assessed at both wavelengths separately.

QUESTION 3 Item #8): Is it sufficient to verify that the supercontinuum light at

759/1112/1388 nm has a power > 20 nW/mode rather than to separately verify the stability of frequency transfer from 1156 (or 1060/1560 nm).

ANSWER: No this is not sufficient. Frequency transfer stability must be verified for each frequency comb branch. (See also responses for item 7/ANSWER #1)

QUESTION 4 Item #12): regarding the customer furnished 759, 1112, 1399 cw lasers:

A) How many actuators do they each have?

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B) What is the bandwidth of these actuators?

C) What are the modulation voltage requirements for these actuators?

ANSWER: For all lasers, voltage requirements are +/- 10 V.

1112 nm, NKT Koheras BASIK fiber laser, 20 kHz modulation bandwidth (PZT)

759 nm, Toptica TA Pro, >1 MHz modulation bandwidth (current and PZT)

1388 nm, wavelength stabilized diode laser, >100 kHz modulation bandwidth (current)

QUESTION 5 Specification 1 “Optical frequency comb with high-bandwidth stabilization of carrier-envelope-offset frequency (f_CEO).” QUESTION: Are there specific bandwidth requirements for f_CEO actuation?

ANSWER: The bandwidth must be sufficient for realizing the phase noise and frequency stability requirements listed. While there are no other strict bandwidth requirements, we anticipate that the bandwidth will necessarily exceed 100 kHz.

QUESTION 6 Specification 2 “Comb repetition rate (f_rep) is stabilized with high-bandwidth to customer-furnished ultrastable cw laser at 1156 nm.” QUESTION: Does the comb need the capability to lock the repetition rate directly to an RF source (or is stabilization of the repetition rate through both f_beat and f_CEO acceptable)?

ANSWER: The comb rep rate need not be lockable to an RF source (though this flexibility has added value). Under normal operation, the comb will be stabilized with f_CEO and with f_beat at 1156 nm.

QUESTION 7 Specification 7 “For optical measurements at 698 nm and 871 nm, the comb system must support frequency instability (relative to the 1156 nm customer-supplied reference) at <= 3e-16 at 1 second and <1e-19 at 1000 s.” QUESTION: “Is it necessary to analyze stabilization with the Modified Allan Deviation to observe this level of instability? If there is a preferred data analysis technique (i.e. Allan Deviation, Modified Allan Deviation, etc.) to show instability, it would be good to know.”

ANSWER: Frequency stability should be assessed with the Allan deviation.

THE RFQ CLOSING DATE HAS NOT BEEN EXTENDED.

+++THERE WILL BE NO MORE QUESTIONS AND ANSWERS

POSTED TO THIS SOLICITATION+++

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52.212-2 EVALUATION--COMMERCIAL ITEMS (OCT 2014)

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CLAUSES

52.212-2 EVALUATION--COMMERCIAL ITEMS (OCT 2014)

(a) The Government will award a contract resulting from this solicitation to the responsible offeror whose offer conforming to the solicitation will be most advantageous to the Government, price and other factors considered. The following factors shall be used to evaluate offers:

TECHNICAL CAPABILITY

PAST PERFORMANCE

PRICE

___________________________________________ [Contracting Officer shall insert the significant evaluation factors, such as

(i) technical capability of the item offered to meet the Government requirement;

(ii) price;

(iii) past performance (see FAR 15.304);

(b) Options. The Government will evaluate offers for award purposes by adding the total price for all options to the total price for the basic requirement. The Government may determine that an offer is unacceptable if the option prices are significantly unbalanced. Evaluation of options shall not obligate the Government to exercise the option(s).

(c) A written notice of award or acceptance of an offer, mailed or otherwise furnished to the successful offeror within the time for acceptance specified in the offer, shall result in a binding contract without further action by either party. Before the offer`s specified expiration time, the Government may accept an offer (or part of an offer), whether or not there are negotiations after its receipt, unless a written notice of withdrawal is received before award.

(End of Provision)

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