When the beam from a semiconductor laser is focused through a lens or conducted through a fiber or similar element, it is important to have a clear understanding of the NFP (Near Field Pattern) of the semiconductor laser.

The NFP of a semiconductor laser is extremely small, with a size on the order of 1 um, so precise measurement requires an expansion optics with a high rate of magnification.

The illustration below shows a system capable of precise measurement of the semiconductor laser NFP, using an optics with an expansion magnification rate of 500 times (the A4859-01 NFP optics).

FEATURES

• Measure  NFP  correctly  using  an  optics  500  times  of  magnification
• Quick  measurement  positioning  by  positioning  optical  path

Measurement Object

• LD
• LED
• Optical  fiber
• Waveguide

Measurement Item

• Beam  diameter
• Elliptisity
• Beam  position
• Intensity  distribution