Regular paper

[OPTICAL REVIEW Vol. 19, No. 6 (2012) 395-399]
© 2012 The Japan Society of Applied Physics

Tapered Diode Lasers and Laser Modules near 635 nm with Efficient Fiber Coupling for Flying-Spot Display Applications

Gunnar BLUME, Christian KASPARI*, David FEISE, Alexander SAHM, Bernd SUMPF, Bernd EPPICH, and Katrin PASCHKE

Ferdinand-Braun-Institut, Leibniz Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany

(Received June 1, 2012; Revised June 25, 2012; Accepted July 13, 2012)

Flying-spot displays require light sources in the red, green and blue with a high optical output power and nearly diffraction limited beams. In this paper we present experimental results of red-emitting, AlGaInP based, tapered diode lasers and their integration into diode laser modules. The laser modules emit a collimated, almost diffraction limited beam with an optical output power as high as 1 W at a wavelength close to 635 nm. The tapered laser chips were designed with emphasis on achieving a good beam quality in vertical and lateral directions of a collimated beam. To test the suitability for flying-spot display applications, we performed fiber coupling experiments with a low mode number optical fiber with an etendue as low as 6× 10-6 mm2 sr. A maximum transmission of 70% of the launched power behind the uncoated fiber as well as a usable power in excess of 580 mW were measured.

Key words: tapered diode laser, fiber coupling, brightness, red-emitting

*Present address: LayTec AG, Seesener Str. 10-13, 10709 Berlin, Germany.


© 1994-2012 The Japan Society of Applied Physics
Produced, Developed, and Maintained by The Optical Society of Japan (An Affiliate of the Japan Society of Applied Physics)
Printed in Japan by Komiyama Printing Co., Ltd.

mail to Editorial Office, OPTICAL REVIEW