Table 2.

POF materials, annealing conditions, strain, stress, and force sensitivity of POFBGs.

Fiber Type	Fiber Material	Laser	Annealing Type	Annealing Temperature	Annealing Time	Strain Sensitivity	Stress Sensitivity	Force Sensitivity	Reference
SM POF	PMMA	325 nm He-Cd laser	non-annealed	-	-	1.3 pm/με	-	-	[44]
			pre-annealed	80 °C	2 days	1.37 pm/με	-	-
SM mPOF	PMMA	325 nm CW He-Cd laser	without post-annealing	-	-	0.664 pm/με	0.137 pm/kPa	0.0109 pm/μN	[16]
			post-annealed under water	60 ± 2 °C	2 min	0.726 pm/με	0.217 pm/kPa	0.0137 pm/μN
			without post-annealing	-	-	0.536 pm/με	0.147 pm/kPa	0.0109 pm/μN
			post-annealed under water	60 ± 2 °C	4 min	0.668 pm/με	0.201 pm/kPa	0.0137 pm/μN
			without post-annealing	-	-	0.772 pm/με	0.173 pm/kPa	0.0134 pm/μN
			post-annealed under water	60 ± 2 °C	30 min	0.944 pm/με	0.202 pm/kPa	0.0146 pm/μN
			without post-annealing	-	-	0.714 pm/με	0.184 pm/kPa	0.0136 pm/μN
			post-annealed under water	55 ± 2 °C	30 min	0.880 pm/με	0.220 pm/kPa	0.0165 pm/μN
mPOF	PMMA doped with BDK	325 nm CW He-Cd laser	without post-annealing	-	-	0.68 ± 0.01 pm/με	0.14 ± 0.02 pm/kPa	0.109 ± 0.001 pm/μN	[108]
			post-annealed under water	64 ± 2 °C	2 min	0.73 ± 0.02 pm/με	0.22 ± 0.02 pm/kPa	0.137 ± 0.001 pm/μN
mPOF	PMMA	325 nm CW He-Cd laser	without annealing preform	-	-	1.27 ± 0.01 pm/με	-	-	[39]
			annealing preform	80 °C	2 week	1.33 ± 0.01 pm/με	-	-
mPOF	PMMA	325 nm He-Cd laser	without post-annealing	-	-	0.681 ± 0.009 pm/με	0.141 ± 0.018 pm/kPa	10.92 ± 1.37 pm/mN	[59]
			post-annealed under water	60 ± 2 °C	2 min	0.739 ± 0.019 pm/με	0.217 ± 0.022 pm/kPa	13.65 ± 1.37 pm/mN
			without post-annealing	-	-	0.708 ± 0.007 pm/με	0.180 ± 0.023 pm/kPa	10.92 ± 1.37 pm/mN
			post-annealed under water	60 ± 2 °C	4 min	0.902 ± 0.016 pm/με	0.260 ± 0.025 pm/kPa	14.33 ± 1.37 pm/mN
			without post-annealing	-	-	0.771 ± 0.011 pm/με	0.173 ± 0.024 pm/kPa	13.41 ± 1.85 pm/mN
			post-annealed under water	60 ± 2 °C	30 min	0.943 ± 0.011 pm/με	0.202 ± 0.026 pm/kPa	14.64 ± 1.85 pm/mN
			without post-annealing	-	-	0.711 ± 0.007 pm/με	0.163 ± 0.026 pm/kPa	12.24 ± 1.96 pm/mN
			post-annealed under water	55 ± 2 °C	30 min	0.879 ± 0.020 pm/με	0.191 ± 0.018 pm/kPa	14.37 ± 1.34 pm/mN
GI MM POF	CYTOP	517 nm fs laser system (HighQ laser femtoREGEN)	without post-annealing	-	-	1.13 pm/με	-	−188.3 pm/N	[68]
			post-annealed at low humidity	90 °C	24 h	0.95 pm/με	-	−225.0 pm/N
			post-annealed under water	90 °C	24 h	1.69 pm/με	-	−341.7 pm/N