US 11,683,092 B2
Loss-based wavelength meter
Antoine Bois, Québec (CA); Alexandre Delisle-Simard, Québec (CA); Marie-Josée Picard, L'Ancienne-Lorette (CA); and Michel Poulin, Québec (CA)
Assigned to Ciena Corporation, Hanover, MD (US)
Filed by Ciena Corporation, Hanover, MD (US)
Filed on Feb. 24, 2021, as Appl. No. 17/183,538.
Claims priority of provisional application 62/980,492, filed on Feb. 24, 2020.
Prior Publication US 2021/0266066 A1, Aug. 26, 2021
Int. Cl. H04B 10/07 (2013.01); H04B 10/079 (2013.01); G02B 6/12 (2006.01); H01S 5/0683 (2006.01); H04B 10/67 (2013.01)
CPC H04B 10/07955 (2013.01) [G02B 6/12004 (2013.01); G02B 2006/1215 (2013.01); G02B 2006/12138 (2013.01); G02B 2006/12154 (2013.01); H01S 5/0683 (2013.01); H04B 10/07 (2013.01); H04B 10/07957 (2013.01); H04B 10/674 (2013.01); H04B 10/675 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A loss-based wavelength meter comprising:
a first photodiode and a second photodiode each configured to measure power of monochromatic light; and
a loss section having a monotonic wavelength dependency, configured to perform evanescent coupling of the monochromatic light for athermality based on the loss section being a waveguide configured with an evanescent coupling mechanism, wherein the loss section is located between the first photodiode and the second photodiode, and wherein a wavelength of the monochromatic light is determined based on a ratio of measurements of the first photodiode and the second photodiode.