Punte per SNOM che trasmettono le lunghezze d'onda 600-770nm, fibra di base Nufern 630-HP, diametro della fibra 125um, lunghezza della fibra 2m, apertura inferiore a 100nm.


Material - single mode optical fiber Nufern 630HP.
Probe tip is coated by Al (70nm)/sublayer V (20nm) .
Tip diameter uncoated by Al (tip aperture) ~ 50-100 nm
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:



Probe type


Basic Nufern fiber


Operating wavelength, nm


Mode Field Diameter

4.0 ± 0.5 µm @ 630 nm

Second Mode Cut-Off, nm

570 ± 30

Optical efficiency, 100 nm aperture


Optical efficiency, 50 nm aperture






Uncoated SNOM probe tip

Probe tip with Al coating.

Aperture is about 70nm.