Optical: systems and elements – Optical amplifier – Correction of deleterious effects
Patent
1992-01-31
1993-11-09
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Correction of deleterious effects
359344, 372 87, 257431, H01S 319, H01L 3300
Patent
active
052608220
ABSTRACT:
A semiconductor laser gain structure having a tapered gain region comprising cavity spoilers for receiving light which is reflected off of the output facet back into the semiconductor and removing it from the gain region so as to reduce or eliminate self oscillation. The boundaries of the gain region are also designed to have a very low refractive index gradient so as to minimize reflection of light off of the boundaries back into the gain region. The gain structure may be embodied in a semiconductor laser oscillator or semiconductor laser amplifier depending on whether the input facet is or is not, respectively, anti reflection coated. The output facet is anti-reflection coated in either embodiment.
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Chinn Stephen R.
Kintzer Emily S.
Missaggia Leo J.
Walpole James N.
Wang Christine A.
Massachusetts Institute of Technology
Moskowitz Nelson
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