Optical Coupling Structures of Fiber-Optic Mach-Zehnder Interferometers Using CO₂ Laser Irradiation

Table 1

The relationship between 𝐿 and interference signals.

The number of samples = 10
𝐿 (mm)	10	20	30	40	50
Average spacing (nm); = (Δ𝜆1+Δ𝜆2+⋯+Δ𝜆𝑛)/𝑛	45.9	26.6	16.8	13.8	9.9
Standard deviation (nm)	2.29	2.29	0.38	0.10	0.15