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 |
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.
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