Your reference*
Laser	Min. wavelength*: Max. wavelength*: Class: Medium:
Beam characteristics	Divergence (mrad)*: Diameter (mm)*: Profile shape*: M2*: Waist dist. (mm)*: Pointing stability*:
Polarisation	Type: Purity (hor./vert.):
Continuous wave	Maximum optical power (W):
Pulsed	Max. energy (mW): At (Hz): Max. power (W): At (Hz): Contrast ratio: Rep. rate: (Hz): Optical pulse delay (ns): Optical pulse jitter (SDev) (ns): Pulse duration (FWHM) (ns): Pulse energy stability (Sdev) (%):
Fibre	Core diam. (µm)*: Connector type*:
Comments	Please enter any further requirements such as quantities etc.
Contact details	Name*: Organisation*: Email*:

Notes

Free space

Beam profile:

• Collimation with 1 glass aspheric lenses leads to elliptical shape

• Aspheric lens leads to circular modulations of the beam profile which vanishes at focus

• Single mode (transversal) diode laser with best possible beam parameter product M² near 1 used

• Beam profile dimension depends on wavelength: 3 x 1.3mm for 405nm and 5 x 2mm for 1550nm

• Beam diameter measured behind exit aperture with CCD camera

• Beam profile measured at large and small axis of ellipse with 86.5% power content (intensity drop to 1/e²=13.5% drop)

• Circular beam profile possible with anamorphotic prism pair

Pointing stability:

• Very good pointing stability since no moving parts and no thermal stress as in DPSS systems or gas lasers

• <20 µrad

Polarisation Purity:

• Typically between 50:1 and 100:1 or between 30 and 40dB extinction ratio

Optical pulse delay:

• Delay between trigger out pulse and optical pulse is about 70ns

Fibre Coupled

Beam profile:

• For single mode fibers (SMF) circular Gaussian beam profile, NA typ. 0.13, dimension depends on fiber collimator attached to SMF

• Theoretical best possible beam quality with SMF on cost of fiber coupling efficiency (typ. 40% to 50%)

• For multimode fibers Gaussian beam profile with worse beam propagation compared to SMF, NA=0.22 to 0.27

Pointing stability:

• As good as with free space, <20µrad

Polarisation purity:

• Standard SMF (random) elliptical polarized light at the end of fiber

• Polarisation maintaining fibres with 20 to 30 dB extinction ratio

Optical pulse delay:

• Same as free space since fibre delivers only a couple of ns delay additionally