Table 2.

Performance parameters of optical fiber magnetic field sensors based on MF.

Detection Mechanism	Optical Fiber Configuration	Ferrofluid	Magnetic Field Direction (Fiber Axis)	Detecting Range	Sensitivity/Resolution	Response Time	Ref
Wavelength shift	eFBG	Fe3O4	Perpendicular	0–25 mT	86 pm/25 mT (no linear behavior)	15 s	[33]
Cladding mode intensity	FBG/ TCF	Ferromagnetic particles	Perpendicular	7–15 mT	−0.78 dB/mT	30 s	[34]
Fresnel reflectivity	FBG	EMG 607	Perpendicular	0–5 mT	________________	______	[35]
Wavelength shift	PS-FBG	EMG 605	Perpendicular	0–12 mT	24.2 pm/mT	______	[86]
Fringes visibility Wavelength shift	TFBG	EMG 605	Perpendicular	30–140 mT 30–85 mT	1.4 mT 0.4 pm/mT 2.5 mT	______	[37]
Extinction ratio	TFBG	EMG 605	Perpendicular	0–19.6 mT	________________	______	[38]
Intensity of the reflected optical power	TFBG/CFBG	EMG 605	Perpendicular	0–14 mT	1470 nW/mT (0–8 mT)	______	[39]
Wavelength shift	TFBG	EMG 705	Perpendicular	0–32 mT	106 pm/35 mT (0–19 mT; no linear behavior)	______	[40]
Wavelength shift	LPG	Fe3O4	Perpendicular	0–166.1 mT	7400 pm/166.1 mT (no linear behavior)	______	[29]
Resonance wavelength shift	LPG (MOF)	EMG 605	Perpendicular	0–166.1 mT	1946 pm/mT (0–30 mT)	______	[42]
Resonance wavelength shift	FPI (HC-PCF)	CdFe2O4	__________	5–15 mT	330 pm/mT	______	[49]
Resonance wavelength shift	FPI (SMF)	EMG 507	__________	0–40 mT	431 pm/mT 0.05 mT	______	[50]
Resonance wavelength shift	FPI (SMF)/FBG	EMG 507	__________	0–60 mT	400 pm/mT 0.05 mT	______	[51]
Resonance wavelength shift	FPI (SMF)/FBG	EMG 605	Parallel	20–60 mT	530 pm/mT 0.038 mT	______	[52]
Wavelength shift	MZI	EMG 605	Perpendicular	0–30 mT	23.67 pm/mT 0.422 mT	______	[55]
Transmitted power variation	MZI	EMG 605	Perpendicular	0–40 mT	−0.3407 dB/mT (10–30 mT)	______	[56]
Wavelength shift	MZI	EMG 507	Perpendicular	0–6.66 mT	720 pm/mT	______	[57]
Wavelength shift	MI	Fe3O4	Perpendicular	0–200 mT	64.9 pm/mT	______	[61]
Wavelength shift Intensity variation	SI	EMG 605	Perpendicular	0–30 mT	167 pm/mT 0.060 mT 3.998 dB/mT (dynamic)	10–30 ms	[65]
Wavelength shift	Loyt-SI	EMG 605	Perpendicular	0–20 mT	5928 pm/mT	______	[66]
Wavelength shift	SI	EMG 507	Parallel	10–40 mT	1073 pm/mT 0.001 mT	______	[67]
Wavelength shift	SI	Fe3O4	Perpendicular	10–25 mT 41–60 mT	5300 and −5800 pm/mT 3840 and −4300 pm/mT	______	[87]
Wavelength shift	SPR/DLUWT	EMG 607	Parallel	<10 mT (only linear behavior)	~10,000 pm/mT ~0.3 mT	______	[73]
Wavelength shift	SPR/MNF	EMG 507	Perpendicular	0–34.9 mT	3030 pm/mT	______	[74]
Wavelength shift	SPR/D-shaped PCF	Fe3O4		0–55 mT	870 pm/mT	______	[75]
Ring down time	FLRDS/etched fiber	EMG 507	Perpendicular	0–65 mT	−1.256 mT/μs 2.5 mT	______	[78]
Wavelength shift Intensity variation	CCMI	Fe3O4	Perpendicular	0–21.4 mT 0–185.2 mT	−162.06 pm/mT −0.098 dB/mT	______	[79]
Wavelength shift	Tapered PCF	EMG 507	Parallel	10–60 mT	160.4 pm/mT 0.062 mT	30 min	[80]
Wavelength shift	U-bent NCF	EMG 605	Perpendicular	1.6–9.6 mT	3185.2 pm/mT	______	[81]
Wavelength shift Intensity variation	SMS	Fe3O4	Perpendicular	3–11 mT	659 pm/mT 1.185 dB/mT	______	[82]
Coupling wavelength dip	SNS/RIMC	Exp08103	Perpendicular	≤6 mT 6–26 mT	6330 pm/mT 1830 pm/mT	______	[83]
Wavelength shift	Etched SMS	Fe3O4	Perpendicular	12.0–32.5 mT	−168.6 pm/mT	______	[84]
Wavelength shift Transmission loss	SNS	EMG 605	__________	4–10 mT	905 pm/mT 0.748 dB/mT	______	[85]

PS: Phase-shift.