Wavelength monitoring method and apparatus and method of making same
AssigneeAvago Technologies General IP Pte Ltd
InventorAndrew Harker
Life of this patent
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Abstract
A wavelength of an optical source is monitored by first and second adjacent detectors on a common base. A bulk reflective component has first and second partially reflective surfaces that respectively direct first and second portions of energy from the source to the first and second detectors. A wavelength discriminator is positioned between the first detector and first surface. An optical isolator downstream of the reflective component prevents radiation from the source and exiting the component from being coupled to the detectors and back to the source.
Claims15
Apparatus for monitoring a wavelength of optical electromagnetic radiation, the apparatus comprising:
- a first optical radiation detector disposed adjacent a second optical radiation detector;
- and
- a reflective component positioned so the monitored radiation is adapted to the incident on it, for supplying first and second portions of the monitored radiation incident on it to the first and second detectors, the first detector being associated with a wavelength discriminator arrangement for causing the first detector to derive an output signal dependent on the wavelength discriminator arrangement;
- the reflective component being a bulk component having a first partially reflective surface for reflecting the first portion of the electromagnetic radiation towards the first detector and a second partially reflective surface for reflecting a second portion of the electromagnetic radiation towards the second detector, the second partially reflective surface being substantially opposite the first partially reflective surface.
An apparatus for monitoring a wavelength of optical electromagnetic radiation, the apparatus comprising:
- an electromagnetic radiation director arranged to direct a first portion of optical electromagnetic radiation incident thereon and cause a second portion of the incident electromagnetic radiation to propagate through it;
- and
- an isolator device located downstream of the electromagnetic radiation director so a substantial amount of the second portion of the incident electromagnetic radiation is incident on the isolator device for thereby preventing the second portion of the incident electromagnetic radiation from being fed back through the electromagnetic radiation director.
A method of preventing optical electromagnetic radiation emitted by a source of the optical electromagnetic radiation from being fed back through an electromagnetic radiation director to the source of the electromagnetic radiation comprising the step of positioning an optical isolator downstream of the director.
A method of manufacturing an apparatus for monitoring a wavelength of electromagnetic radiation comprising:
- forming a semiconductor base using a semiconductor manufacturing technique,
- disposing a component on the semiconductor base to form a part of a component configuration constituting a wavelength monitoring apparatus.
A method of monitoring a wavelength of optical electromagnetic radiation using an apparatus for monitoring the wavelength of the optical electromagnetic radiation, the apparatus comprising a first optical detector disposed adjacent a second optical detector, an optical wavelength discriminator arrangement associated with the first detector for causing the first detector to derive an output signal dependent on the wavelength discriminator arrangement, and a reflective optical component, the reflective component being a bulk component having a first partially reflective surface, the method comprising the step of:
- directing the electromagnetic radiation towards the reflective component so the first partially reflective surface reflects a first portion of the electromagnetic radiation towards the first detector and the second partially reflective surface reflects a second portion of the electromagnetic radiation towards the second detector,
A method of monitoring a wavelength of optical electromagnetic radiation comprising positioning a bulk component having a first partially reflective surface and a second partially reflective surface so the first and second surfaces respectively reflect a first portion of the optical electromagnetic radiation incident on the bulk component and a second portion of the electromagnetic radiation incident on the bulk component.
A wavelength monitoring apparatus comprising a reflective component, the component comprising a bulk component having a first partially reflective surface and a second partially reflective surface substantially opposite the first partially reflective surface, the first partially reflective surface being arranged relative to the second partially reflective surface for reflecting a first portion and a second portion of electromagnetic radiation incident on the bulk component for respective incidence on a first detector having a predetermined separation from a second, adjacent, detector.
Dependencies are inferred from the claim text.