Université de Neuchâtel

Efficient beamshaping of high-power diode lasers using micro-optics

Herzig, Hans-Peter ; Schilling, Andreas ; Stauffer, Laurent ; Vokinger, Urs ; Rossi, Markus

In: Gradient Index, Miniature, and Diffractive Optical Systems II (Proceedings of SPIE), 2001, vol. 4437, p. 134-141

We designed, fabricated and characterized a micro-optical beamshaping device, intended to optimize the coupling of an incoherent, linearly extended high-power diode-laser into a multimode fiber. The device uses two aligned micro-optical elements (DOEs) in combination with conventional optics. With a first prototype we achieved an overall efficiency of 28 %. Straightforward improvements, like...

Université de Neuchâtel

Fabrication technologies for micro-optical elements with arbitrary surfaces

Schilling, Andreas ; Nussbaum, Philippe ; Philipoussis, Irene ; Herzig, Hans-Peter ; Stauffer, Laurent ; Rossi, Markus ; Kley, Ernst-Bernhard

In: Micromachining Technology for Micro-Optics (Proceedings of SPIE), 2000, vol. 4179, p. 65-72

We present a comparison of three different technologies for the fabrication of micro-optical elements with arbitrary surfaces. We used direct laser writing in photoresist, binary mask lithography in combination with reactive ion etching in fused silica, and High-Energy- Beam-Sensitive (HEBS) glass graytone lithography in photoresist. We analyzed the efficiencies and the deflection angles of...

Université de Neuchâtel

Efficient Beam Shaping of Linear, High-Power Diode Lasers by Use of Micro-Optics

Schilling, Andreas ; Herzig, Hans-Peter ; Stauffer, Laurent ; Vokinger, Urs ; Rossi, Markus

In: Applied Optics, 2001, vol. 40, no. 32, p. 5852-5859

We have designed, fabricated, and characterized a micro-optical beam-shaping device that is intended to optimize the coupling of an incoherent, linearly extended high-power diode laser into a multimode fiber. The device uses two aligned diffractive optical elements (DOEs) in combination with conventional optics. With a first prototype, we achieved an overall efficiency of 28%. Straightforward...