Title :
Semiconductor laser with tapered-rib adiabatic-following fiber coupler for expanded output-mode diameter
Author :
Vawter, G.A. ; Smith, R.E. ; Hou, H. ; Wendt, J.R.
Author_Institution :
Sandia Nat. Labs., Albuquerque, NM, USA
fDate :
4/1/1997 12:00:00 AM
Abstract :
A new expanded-mode AlGaAs diode laser with reduced far-field divergence and 0.9 dB single-mode optical fiber coupling loss is demonstrated. This new laser achieves a two-dimensional (2-D) expansion of the fundamental output mode with a rib waveguide tapered in only one dimension. Stable fundamental-mode operation with a narrow, 5.7/spl deg/ by 7.40 full-width-at-half-maximum far-field divergence is observed well above lasing threshold. Tapered waveguide dimensions are compatible with conventional optical lithographic techniques, making this device suitable for mass production.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; laser modes; laser stability; optical fibre couplers; photolithography; quantum well lasers; rib waveguides; waveguide lasers; 2D fundamental output mode expansion; AlGaAs; MQW lasers; above lasing threshold; expanded output-mode diameter; far-field divergence; mass production; optical lithographic techniques; reduced far-field divergence; rib waveguide; semiconductor laser; single-mode optical fiber coupling loss; stable fundamental-mode operation; tapered waveguide dimensions; tapered-rib adiabatic-following fiber coupler; Diode lasers; Fiber lasers; Laser modes; Optical coupling; Optical fiber couplers; Optical fiber losses; Optical fibers; Optical waveguides; Semiconductor lasers; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
