US 11,658,453 B2
Concentric cylindrical circumferential laser
Ronald LaComb, West Greenwich, RI (US); and Kevin LaComb, Haddam, CT (US)
Filed by Ronald LaComb, West Greenwich, RI (US); and Kevin LaComb, Haddam, CT (US)
Filed on Nov. 24, 2020, as Appl. No. 17/103,470.
Application 17/103,470 is a continuation in part of application No. 16/252,928, filed on Jan. 21, 2019, abandoned.
Claims priority of provisional application 62/623,476, filed on Jan. 29, 2018.
Prior Publication US 2021/0104861 A1, Apr. 8, 2021
Int. Cl. H01S 3/083 (2006.01); H01S 3/06 (2006.01); H01S 3/067 (2006.01); H01S 3/0941 (2006.01); H01S 5/40 (2006.01); H01S 5/10 (2021.01); H01S 5/02255 (2021.01); H01S 5/042 (2006.01); H01S 5/22 (2006.01); H01S 5/12 (2021.01); H01S 5/20 (2006.01); H01S 5/42 (2006.01); H01S 5/185 (2021.01)
CPC H01S 3/083 (2013.01) [H01S 3/0627 (2013.01); H01S 3/0675 (2013.01); H01S 3/0941 (2013.01); H01S 5/1075 (2013.01); H01S 5/4056 (2013.01); H01S 5/02255 (2021.01); H01S 5/04254 (2019.08); H01S 5/04256 (2019.08); H01S 5/12 (2013.01); H01S 5/185 (2021.01); H01S 5/204 (2013.01); H01S 5/2219 (2013.01); H01S 5/4075 (2013.01); H01S 5/42 (2013.01)] 40 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a cylindrical ring waveguide having an inner radius and an outer radius;
at least one gain medium housed within the cylindrical ring waveguide; and
at least one pump source;
wherein the cylindrical ring waveguide is configured to support a plurality of modes;
wherein the pump source is configured to provide pump power that overlaps with the gain medium to provide increased optical gain within a gain confining region relative to any optical gain outside the gain confining region; and
wherein the gain confining region is limited in radial extent with an outer radius less than the outer radius of the cylindrical ring;
waveguide to favor amplification of one or more selected modes having intensity peaks inside the outer radius of the gain confining region over other modes having a lower overlap with the gain confining region than the selected modes.