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

Table 2

The size matching of various 𝐿s with the coupling and decoupling structure.

𝐿 (mm)	Width of removal (𝑊) (𝜇m)		Depth of removal (𝐷) (𝜇m)		Samples (sensors)
	Mean	Standard deviation	Mean	Standard deviation
10	163.90	2.83	32.80	1.57	10
20	168.05	4.74	40.85	1.77
30	165.50	2.69	49.70	3.53
40	162.30	4.95	44.35	4.88
50	163.65	5.30	37.75	3.89