US 12,235,496 B2
Method and system for stabilizing fiber grating optical parameters
John R. Marciante, Webster, NY (US)
Assigned to RAM Photonics Industrial, LLC, Webster, NY (US)
Filed by RAM Photonics Industrial, LLC, Webster, NY (US)
Filed on Mar. 22, 2024, as Appl. No. 18/614,520.
Application 18/614,520 is a division of application No. 17/582,293, filed on Jan. 24, 2022, granted, now 11,960,130.
Claims priority of provisional application 63/140,709, filed on Jan. 22, 2021.
Prior Publication US 2024/0231019 A1, Jul. 11, 2024
Int. Cl. G02B 6/42 (2006.01); F21V 8/00 (2006.01)
CPC G02B 6/4243 (2013.01) [G02B 6/4266 (2013.01); G02B 6/0026 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of stabilizing a fiber Bragg grating (FBG) disposed in a thermomechanical housing, the method including:
performing an initialization process including:
setting a temperature of the FBG to an initial value;
changing the temperature of the FBG to a final value;
measuring a transmission ratio at a plurality of FBG temperatures between the initial value and the final value;
determining a maximum transmission ratio;
setting the temperature of the FBG to the initial value; and
setting a target transmission ratio equal to a predetermined fraction of the maximum transmission ratio; and
changing the temperature of the FBG until the transmission ratio equals the target transmission ratio;
performing an operation process including:
(a) measuring the transmission ratio;
(b) adjusting the FBG temperature to align the measured transmission ratio with the predetermined fraction of the maximum transmission ratio; and
(c) iteratively performing (a) and (b).