High resolution multi-pass optical spectrum analyzer
AssigneeViavi Solutions Inc.
InventorsDriss Touahri, Christopher Russell Wagner
Life of this patent
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Abstract
A system for a high resolution optical spectrum analyzer (OSA) using an efficient multi-pass configuration is disclosed. The system may include an entrance slit to allow inward passage of an optical beam. The system may also include a grating element to diffract the optical beam. The system may further include a retroreflective element to retroreflect the optical beam. The system may also include a mirror to reflect the optical beam. The system may include an exit slit, which in some examples may be adjacent to the entrance slit. The exit slit may allow outward passage of the optical beam for a high resolution optical measurement.
Claims18
A system, comprising:
- an entrance slit to allow inward passage of an optical beam;
- a grating element to receive the optical beam and diffract the optical beam;
- a retroreflective element to directly receive the diffracted optical beam and retroreflect the diffracted optical beam back to the grating element;
- a mirror, located adjacent to the entrance slit, to receive the diffracted and retroreflected optical beam from the grating element and reflect the diffracted and retroreflected optical beam back to the grating element, wherein the optical beam passes through the grating element four times, the retroreflective element two times, and the mirror one time;
- and
- an exit slit, adjacent to the entrance slit and the mirror, to allow outward passage of the optical beam that has passed through the grating element four times for a resolution optical measurement.
A method for providing a configuration for a resolution optical measurement, comprising:
- providing an entrance slit to allow inward passage of an optical beam;
- providing a grating element to receive the optical beam and diffract the optical beam;
- providing a retroreflective element to receive the diffracted optical beam and retroreflect the diffracted optical beam back to the grating element;
- providing a mirror, located adjacent to the entrance slit, to receive the diffracted and retroreflected optical beam from the grating element and reflect the diffracted and retroreflected optical beam back to the grating element, wherein the optical beam passes through the grating element four times, the retroreflective element two times, and the mirror one time;
- and
- providing an exit slit, adjacent to the entrance slit and the mirror, to allow outward passage of the optical beam that has passed through the grating element four times.
A non-transitory computer-readable storage medium storing instructions, which when executed by a processor cause the processor to:
- allow inward passage of an optical beam through an entrance slit;
- provide a grating element to receive the optical beam and, diffract the optical beam;
- provide a retroreflective element to receive the diffracted optical beam and retroreflect the diffracted optical beam back to the grating element;
- provide a mirror, located adjacent to the entrance slit, to receive the diffracted and retroreflected optical beam from the grating element and reflect the diffracted and retroreflected optical beam back to the grating element, wherein the optical beam passes through the grating element four times, the retroreflective element two times, and the mirror one time;
- and
- provide an exit slit, adjacent to the entrance slit and the mirror, to allow outward passage of the optical beam that has passed through the grating element four times for a resolution optical measurement.
Dependencies are inferred from the claim text.