Surface emitting laser
OwnerWenbin Jiang, Chan-Long Shieh +2inventors
InventorsWenbin Jiang, Chan-Long Shieh, Xiqing Sun, Hsing-Chung Lee
Life of this patent
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Abstract
A surface emitting diode, such as a laser, including an active region positioned between first and second semiconductor layers and extending longitudinally. The active region and at least portions of the first and second semiconductor layers defining first and second facets positioned at opposite ends of the length with the first facet defining a light output for the active region. The active region is adjusted to emit a single mode of light. A reflective element is positioned adjacent to the first facet and at an angle with the first facet for receiving light output from the active region and directing the light perpendicular to the active region.
Claims28
A surface emitting laser comprising:
- an active region positioned between first and second semiconductor layers and extending a length along a longitudinal axis, the active region and at least portions of the first and second semiconductor layers defining first and second facets positioned at opposite ends of the length with the first facet defining a light output for the active region, the active region being adjusted to emit a single mode of light;
- and
- a reflective element positioned adjacent the first facet and at an angle with the first facet for receiving light output from the active region and directing the light at an angle to the direction of the length.
A surface emitting laser comprising:
- an active region positioned between first and second semiconductor layers and extending a length along a longitudinal axis, the active region and at least portions of the first and second semiconductor layers defining first and second facets positioned at opposite ends of the length with the first facet defining a light output for the active region, the length of the active region being adjusted to emit a single mode of light by adjusting the wavelength difference, Δλ, defined by the equation
- Δλ=(λ2/2nL) Δm,
- wherein L is the length of the active region cavity, n is the index of refraction of the active region cavity, λ is the operating wavelength of the active region cavity at a given mode, and Δm is the difference between the different modes of operation;
- and
- a reflective element positioned adjacent the first facet and at an angle with the first facet for receiving light output from the active region and directing the light at an angle to the direction of the length.
A method of fabricating a surface emitting laser comprising the steps of:
- forming an active region on a first substrate between first and second semiconductor layers and extending a length along a longitudinal axis, the active region and at least portions of the first and second semiconductor layers being formed to define first and second facets positioned at opposite ends of the length with the first facet defining a light output for the active region, adjusting the active region to emit a single mode of light;
- forming a reflective surface on a second substrate;
- mounting the active region on the second substrate with the reflective surface adjacent the first facet and at an angle with the first facet for receiving light output from the active region and directing the light at an angle to the direction of the length;
- and
- removing the first substrate to expose the reflective surface.
A surface light emitting diode comprising:
- an active region positioned between first and second semiconductor layers and extending a length along a longitudinal axis, the active region and at least portions of the first and second semiconductor layers defining first and second facets positioned at opposite ends of the length with the first facet defining a light output for the active region;
- and
- a polymer reflective element positioned adjacent the first facet and at an angle with the first facet for receiving light output from the active region and directing the light at an angle to the direction of the length.
Dependencies are inferred from the claim text.