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- W2040247921 abstract "We report on low-loss, alignment-tolerant coupling between a single quantum well GaAs/AlGaAs laser and a cleaved single mode fiber. The laser has been fabricated using conventional growth and processing techniques. The mode size in the transverse direction is expanded by using a diluted waveguide structure to better match the fiber mode size. The diluted waveguide was realized by reducing the Al mole fraction between the core and the cladding, thus providing weak confinement. Very small far field divergence angles (15 degree(s) (transverse) and 4.5 degree(s) (lateral)) were measured from this device, indicative of the expanded mode. A butt coupling efficiency of 70% was achieved against a theoretically possible 78%. In addition, large misalignment tolerances for a 1 dB excess loss of +/- 2 micrometers in the lateral and +/- 1.5 micrometers in the transverse directions, were measured. The T<SUB>o</SUB> of the device was found to be 112 K, showing that the carrier leakage is not significant despite the diluted nature of the waveguide." @default.
- W2040247921 created "2016-06-24" @default.
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- W2040247921 date "1996-05-01" @default.
- W2040247921 modified "2023-09-23" @default.
- W2040247921 title "<title>Low-loss alignment-tolerant coupling from a GaAs/AlGaAs QW laser to a single-mode fiber</title>" @default.
- W2040247921 doi "https://doi.org/10.1117/12.238909" @default.
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