Table 1 Specifications for laser parameters

Central wavelength (nm)

825

Wavelength tolerance (nm)

± 10

Max output power (W)

1

Fiber core diameter (µm)

60

Mode

Continuous wave mode

Beam shape

Circular

Numerical aperture

0.14

Spectral width (FWHM, nm)

< 3.0

Irradiance power at skin (mW/cm²)

40

Laser transmission ratio to skin and skull (%)

63.6

Distance to the head from the end of a fiber (cm)

4

Exposure duration (s)

380

Focused beam spot size (mm²)

14.01

Number of points irradiated

1

Radiant exposure at brain (J/cm²)

15.2