Laser Diode Fiber Optic Coupling

The laser has a beam diameter of 0 81 mm and divergence 1 0 mrad.

Laser diode fiber optic coupling.

The rp photonics buyer s guide contains 74 suppliers for fiber coupled diode lasers. Fiber optics are widely used in laser technology because of their ability to trap light and guide it from one location to another without experiencing. While all of toptica s diode lasers can be combined with toptica s versatile fiber launch. Core diameter and numerical aperture we mentioned how the numerical aperture depends on the relationship between the index of the core and the cladding and that this directly relates to the angular.

Further a microlens can cause maximum coupling if it has sufficiently large aperture so as to collect the entire incident light its transformed spot size matches the laser spot size and it will have no spherical aberration 1 2. Different kinds of microlenses are fabricated on fiber tips in order to maximise laser to fiber coupling. An even more important restriction is that the angle from the lens to the fiber θ 2 must be less than the na of the optical fiber. The beam was delivered via a 1 mm diameter optic fiber terminated with a 200 mm collimating and focussing optic attached to a motoman up20 robot see figure 20 5a.

The fiber end is either open or terminated with an optical connector both pc and apc polishing can be done. Our range of laser diodes with fiber connection and optical plugs is extensive. In fact for confocal micoscopy setups the coupling of a laser diode head into a polarization maintaining single mode fiber is nearly a must. Fiber coupling vs distance the manufacturer of the laser diode mitsubishi specifies that the maximum fiber coupled power is 0 8mw 16 efficiency at a position of 1 9mm from the ball lens.

A demonstration of how to couple a laser in free space into an optical fiber. The typical coupling efficiencies for elliptical laser diode beam shapes is 40 for single mode and 80. Fiber coupling part 1 of 2 fiber coupled diode lasers have become commonplace since the telecom boom of the 1990s but many people still don t fully understand the intricacies of the fiber coupling process itself. Fiber coupling vs distance 0 5 10 15 20 25 1 51 7 1 92 1 2 32 5 distance mm fiber coupling fiber coupling fig 11.

Let s consider coupling the light from a r 30990 hene laser into an f msd fiber. Laser diodes are available with an fc st or sc receptacle or with core diameters of 3 200 µm for the fiber coupled versions. The fiber has a core diameter of 50 µm and an na of 0 20. Laser processing of as cast nab with nominal composition cu 8 5al 5ni 4 5fe wt was carried out with a fiber coupled 3 5 kw laserline diode laser.

Lumibird manufactures various fiber coupled laser diodes modules with compact design high peak power up to 600 w and high coupling efficiency. Fibers are field replaceable.