Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask

Table 1

Active fibers evaluated.

Fiber	Dopant	Loss (dB/m) at 𝜆 nm		Core size	𝜆cutoff	NA
		1532	980	(𝜇m)	(nm)
INO EY302	Er:Yb	29	227	4×6	1145	0.14
INO EY305	Er:Yb	22	477	6	1200	0.18
INO EY550	Er:Yb	11.2	593	2.5×9	900	0.17
Coractive EY18-06	Er:Yb	58	400	6	na	0.18
INO Yb214	Y	0	612	6.2	900	0.12
INO Er406	Er	37	18	3.4	860	0.2
Corguide	Er	25	10	6	na	na
Brown University	Er	12	4	8	na	na