Table 1.

The Q factor and fineness of MKRs under the same wavelength of 1550 nm.

NO.	Fiber Diameter d (μm)	MKR Diameter D (μm)	Q-Factor	Fineness
	2.45	548	2.6 × 104	16.4
	2.3	1161	4.8 × 104	14.5
	2.5	492	1.8 × 104	12.45
	3.0	1104	2.3 × 104	7.39
	3.6	173	0.5 × 104	10.76
	3.91	473	3.0 × 104	11.69