Table 1: Manufacturer and characteristics of the fibers in the K-, H-, and J-bands. NA: numerical aperture, $\lambda _{\rm c}$ : cut-off wavelength, $\oslash$ : diameters, Conc.: core concentricity.
K-band Highwave NA = 0.16; $\lambda _{\rm c}$ = 1900 nm

Silica Core $\oslash$ = 9.7 $\mu$ m; Conc. < 5 $\mu$ m

Elliptical core Coating $\oslash$ = 245 $\mu$ m

Absolute length = 1.30 m $\pm$ 0.01 m

Length difference after polishing: $\leq$ $11~\mu$ m

H-band Fujikura NA = 0.15; $\lambda_{\rm c}=1150$ nm

Silica Mode $\oslash=5.5~\mu$ m@1300 nm; Conc. 0.2 $\mu$ m

Panda core Coating $\oslash=245$ $\mu$ m

Absolute length = 1.30 m $\pm$ 0.01 m

Length difference after polishing: $\leq$ $12~\mu$ m

J-band Fibercore NA = 0.14; $\lambda_{\rm c}=944$ nm

Silica Mode $\oslash=6.3~\mu$ m@1060 nm; Conc. 0.28 $\mu$ m

Bow tie core Coating $\oslash$ = 245 $\mu$ m

Absolute length = 1.30 m $\pm$ 0.01 m

Length difference after polishing: $\leq$ $20~\mu$ m

**Table 1:** Manufacturer and characteristics of the fibers in the K-, H-, and J-bands. NA: numerical aperture, $\lambda _{\rm c}$ : cut-off wavelength, $\oslash$ : diameters, Conc.: core concentricity.
K-band	Highwave	NA = 0.16; $\lambda _{\rm c}$ = 1900 nm
	Silica	Core $\oslash$ = 9.7 $\mu$ m; Conc. < 5 $\mu$ m
	Elliptical core	Coating $\oslash$ = 245 $\mu$ m
		Absolute length = 1.30 m $\pm$ 0.01 m
		Length difference after polishing: $\leq$ $11~\mu$ m
H-band	Fujikura	NA = 0.15; $\lambda_{\rm c}=1150$ nm
	Silica	Mode $\oslash=5.5~\mu$ m@1300 nm; Conc. 0.2 $\mu$ m
	Panda core	Coating $\oslash=245$ $\mu$ m
		Absolute length = 1.30 m $\pm$ 0.01 m
		Length difference after polishing: $\leq$ $12~\mu$ m
J-band	Fibercore	NA = 0.14; $\lambda_{\rm c}=944$ nm
	Silica	Mode $\oslash=6.3~\mu$ m@1060 nm; Conc. 0.28 $\mu$ m
	Bow tie core	Coating $\oslash$ = 245 $\mu$ m
		Absolute length = 1.30 m $\pm$ 0.01 m
		Length difference after polishing: $\leq$ $20~\mu$ m

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