Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2006-08-15
2006-08-15
Parker, Kenneth (Department: 2815)
Coherent light generators
Particular active media
Semiconductor
C372S018000, C372S019000, C372S043010, C372S066000, C372S103000, C372S050110
Reexamination Certificate
active
07092425
ABSTRACT:
Using lateral physical modulation, the optical properties of VCSELs can be stabilized and controlled by spatially varying the characteristics of the device material. This results in stabilization of the linewidth, the numerical aperture, the near and far field, as a function of bias and temperature. A VCSEL includes a substrate, an active region sandwiched between an upper and lower distributed Bragg reflector (DBRs), and electrical contacts. A light emission property e.g. the index of refraction, may be varied by patterning or texturing the surface of the substrate prior to growth of the epitaxial DBR layers or at least one layer of either the upper or lower DBRs, or by inserting a non-planar layer.
REFERENCES:
patent: 5774487 (1998-06-01), Morgan
patent: 5848086 (1998-12-01), Lebby et al.
patent: 5859864 (1999-01-01), Jewell
patent: 6728289 (2004-04-01), Peake et al.
Cheng An-Nien
Giovane Laura
Kuo Hao-chung
Mathis Sheila K.
Peters Frank H.
Avago Technologies General IP (Singapore) Ptd. Ltd.
Diaz José R.
Parker Kenneth
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