MF115_NTF

MF115_NTF - set of 10 SNOM probes, attached to tuning forks (quartz resonator on electrical plate holder), compatible with NT-MDT devices.

Material - single mode optical fiber Nufern 980HP.
Probe tip is coated by Al (70nm)/sublayer V (20nm) .
Tip diameter uncoated by Al (tip aperture) 200 - 300 nm (250±50)
Angle of fiber - about 20 degrees
Maximum optical input power - 400 microWatt
The probes are prepared by chemical etching method.
This method gives the optical efficiency 10² - 10⁴ times better than those obtained by mechanical pulling.

Geometrical & Mechanical fiber Specifications:

Clad Diameter	125.0 ± 1.5 µm
Coating Diameter	245 ± 15 µm
Core-Clad Concentricity	< 0.5 µm
Coating/Clad Offset	≤ 5 µm
Coating Material	UV Cured, Dual Acrylate
Operating Temperature	-55 to +85 °C
Short-Term Bend Radius	≥ 6 mm
Long-Term Bend Radius	≥ 13 mm
Proof Test Level	≥ 200 kpsi (1.4 GN/m²)

SNOM probe characteristics:

Characteristics	Probe type
Characteristics	MF115_NTF
Basic Nufern Fiber	980HP
Operating wavelength, nm	980-1600
Mode Field Diameter	4.2 ± 0.5 µm @ 980 nm 6.8 ± 0.5 µm @ 1550 nm
Second Mode Cut-Off, nm	920 ± 30
Optical efficiency for wavelength 530 nm	~1%
Optical efficiency for working wavelength	~ (10^-5 - 10^-4)

SNOM probe's end

Probe tip with Al coating.

Aperture is 200 - 300 nm (250±50).