Prosecution Insights
Last updated: August 17, 2026
Application No. 18/899,384

MULTI-MODE OPTICAL FIBER TAPER FOR GENERATING BRILLOUIN RESPONSES FROM FORWARD INTER-MODAL INTERACTIONS WITH FUNDAMENTAL ACOUSTIC MODES, METHODS AND SYSTEMS THEREOF

Non-Final OA §102
Filed
Sep 27, 2024
Priority
Sep 29, 2023 — provisional 63/586,544
Examiner
PAYNE, DAVID C
Art Unit
2635
Tech Center
2600 — Communications
Assignee
University of Rochester
OA Round
1 (Non-Final)
43%
Grant Probability
Moderate
1-2
OA Rounds
9m
Est. Remaining
78%
With Interview

Examiner Intelligence

Grants 43% of resolved cases
43%
Career Allowance Rate
9 granted / 21 resolved
-19.1% vs TC avg
Strong +36% interview lift
Without
With
+35.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
7 currently pending
Career history
25
Total Applications
across all art units

Statute-Specific Performance

§101
1.8%
-38.2% vs TC avg
§103
59.7%
+19.7% vs TC avg
§102
28.1%
-11.9% vs TC avg
§112
7.0%
-33.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 21 resolved cases

Office Action

§102
The present application is being examined under the pre-AIA first to invent provisions. DETAILED ACTION Information Disclosure Statement The information disclosure statement (IDS) submitted on December 30, 2024 has been accepted. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1-8, and 12 -14 is/are rejected under 35 U.S.C. 102 (a)(1) as being anticipated by Saracco et al. (US 9285541 B2). Re claim 1, Saracco et al. (US 9285541 B2) disclosed: A multi-mode optical fiber taper for forward inter-modal Brillouin scattering with fundamental acoustic modes (FIM-FAM), comprising: a first multi-mode fiber section having a first radius; e.g. Fig .7, col. 3 lines 28-35, col. 11 lines 54-67) a second multi-mode fiber section having a second radius; an axially homogencous waist section having a third radius, wherein the third radius is smaller than the first radius and the second radius; a first tapered transition section adiabatically connecting the first multi-mode fiber section to the waist section; and a second tapered transition section adiabatically connecting the waist section to the second multi-mode fiber section. (e.g. col. 4, lines 14-19, col. 8 lines 60-67, col. 9 lines 1-11 ) Re claim 2, Saracco et al. (US 9285541 B2) disclosed: The multi-mode optical fiber taper of Claim 1, wherein the first multi-mode optical fiber is a two-mode optical fiber. (e.g. col 4 lines 1-17) Re claim 3, Saracco et al. (US 9285541 B2) disclosed: The multi-mode optical fiber taper of Claim 2, wherein the third radius is in a range of 570nm - 900 nm. (e.g. col 9 lines 14-35) Re claim 4, Saracco et al. (US 9285541 B2) disclosed: The multi-mode optical fiber taper of Claim 1, wherein the first multi-mode optical fiber is able to carry more than two optical modes. . (e.g. col 4 lines 32-55) Re claim 5, Saracco et al. (US 9285541 B2) disclosed: The multi-mode optical fiber taper of Claim 3, wherein the first multi-mode optical fiber is a three-mode optical fiber. (e.g. col 4 lines 32-55) Re claim 6, Saracco et al. (US 9285541 B2) disclosed: 6. The multi-mode optical fiber taper of Claim 5, wherein the third radius is in a range greater than 900 nm. (e.g. col 9 lines 14-35) Re claim 7, Saracco et al. (US 9285541 B2) disclosed: The multi-mode optical fiber taper of any of Claims 1-6, wherein the axially homogeneous waist section has a uniform radius across the waist section with a precision of no more or no less than 10 nm. (e.g. col 4 lines 32-55, col.8 lines 20-40) Re claim 8, Saracco et al. (US 9285541 B2) disclosed: The multi-mode optical fiber taper of Claim 1, further comprising: an air-material boundary or vacuum-material boundary for at least the waist section of the taper. (e.g. col.8 lines 20-40) Re claim 12, Saracco et al. (US 9285541 B2) disclosed: A system of generating a Brillouin signal resonance response by forward inter- modal Brillouin scattering with fundamental acoustic modes (FIM-FAM), comprising: the multi-mode optical fiber taper of Claim 1; and a plurality of polarization controllers optically connected to the first multi-mode fiber section of the taper. (e.g. col. 5 lines 65 – col.6 lines 15) Re claim 13, Saracco et al. (US 9285541 B2) disclosed: The system of Claim 12, further comprising: a mode selective coupler optically connected to the first multi-mode fiber section of the taper, wherein said mode selective coupler combines at least a first optical mode to a second optical mode to become combined within the first multi-mode fiber section. (e,g, Fig. 7, e.g. col. 4, lines 14-19, col. 8 lines 60-67, col. 9 lines 1-11 ) Re claim 14, Saracco et al. (US 9285541 B2) disclosed: The system of Claim 13, wherein the mode selective coupler is selected from one of the group comprising: a mode converting device, a spatial light modulator, an on-chip mode splitter or a photonic lantern. (e.g. col. 16 lines 34-45) Claim Objections Claims 9, 10, and 11 are objected to under 37 CFR 1.75(c) as being in improper form because a multiple dependent claim 7. See MPEP § 608.01(n). Accordingly, the claims 9, 10, and 11 are not been further treated on the merits. Claim 21 is objected to under 37 CFR 1.75(c) as being in improper form because a multiple dependent claim 7, 9, 10, and 11. See MPEP § 608.01(n). Accordingly, the claims 9, 10, and 11 are not been further treated on the merits. It is noted that any citations to specific, pages, columns, lines, or figures in the prior art references and any interpretation of the reference should not be considered to be limiting in any way. A reference is relevant for all it contains and may be relied upon for all that it would have reasonably suggested to one having ordinary skill in the art. See MPEP 2123 Allowable Subject Matter Claims 15 – 20 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to David C Payne whose telephone number is (571)272-3024. The examiner can normally be reached M-W Teleworking 6:30a -2:30p. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /DAVID C PAYNE/Supervisory Patent Examiner, Art Unit 2635
Read full office action

Prosecution Timeline

Sep 27, 2024
Application Filed
Dec 30, 2024
Response after Non-Final Action
Jun 11, 2026
Non-Final Rejection mailed — §102 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
43%
Grant Probability
78%
With Interview (+35.6%)
2y 8m (~9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 21 resolved cases by this examiner. Grant probability derived from career allowance rate.

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