Methods and circuits for controlling drive mechanisms
First Claim
1. A method for aligning an optical package comprising a semiconductor laser operable to emit an output beam with a first wavelength, a wavelength conversion device operable to convert the output beam to a second wavelength, adaptive optics configured to optically couple the output beam into a waveguide portion of an input facet of the wavelength conversion device, a control circuit comprising a first resistive element and a second resistive element, and a drive mechanism coupled to the adaptive optics and configured to adjust a position of the output beam on the input facet, the method comprising:
- applying an advancement waveform to the drive mechanism using the first resistive element to perform an advancement operation during which the drive mechanism advances the adaptive optics in an adjustment direction; and
applying a dither waveform to the drive mechanism using the second resistance element to perform a dither operation during which the drive mechanism oscillates the adaptive optics back and forth in first and second directions to oscillate a position of the output beam on the input facet;
wherein a polarity of the advancement waveform corresponds with the adjustment direction, and the first and second resistive elements are such that a rising edge time and a falling edge time of the dither waveform is greater than a rising edge time and a falling edge time of the advancement waveform.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for aligning an optical package includes applying a dither waveform and an advancement waveform to a drive mechanism. The optical package includes a semiconductor laser operable to emit an output beam with a first wavelength, a wavelength conversion device operable to convert the output beam to a second wavelength, adaptive optics configured to optically couple the output beam into a waveguide portion of an input facet of the wavelength conversion device, and a drive mechanism coupled to the adaptive optics and configured to adjust a position of the output beam. The dither waveform oscillates the adaptive optics back and forth in first and second directions to oscillate the output beam on the input facet. The advancement waveform advances the adaptive optics in an adjustment direction. Rising and falling edge times of the dither waveform are greater than rising and falling edge times of the advancement waveform.
-
Citations
19 Claims
-
1. A method for aligning an optical package comprising a semiconductor laser operable to emit an output beam with a first wavelength, a wavelength conversion device operable to convert the output beam to a second wavelength, adaptive optics configured to optically couple the output beam into a waveguide portion of an input facet of the wavelength conversion device, a control circuit comprising a first resistive element and a second resistive element, and a drive mechanism coupled to the adaptive optics and configured to adjust a position of the output beam on the input facet, the method comprising:
-
applying an advancement waveform to the drive mechanism using the first resistive element to perform an advancement operation during which the drive mechanism advances the adaptive optics in an adjustment direction; and applying a dither waveform to the drive mechanism using the second resistance element to perform a dither operation during which the drive mechanism oscillates the adaptive optics back and forth in first and second directions to oscillate a position of the output beam on the input facet; wherein a polarity of the advancement waveform corresponds with the adjustment direction, and the first and second resistive elements are such that a rising edge time and a falling edge time of the dither waveform is greater than a rising edge time and a falling edge time of the advancement waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A control circuit for aligning an optical package comprising a semiconductor laser operable to emit an output beam with a first wavelength, a wavelength conversion device operable to convert the output beam to a second wavelength, adaptive optics configured to optically couple the output beam into a waveguide portion of an input facet of the wavelength conversion device, a first resistive element, a second resistive element, and a drive mechanism coupled to the adaptive optics and configured to adjust a position of the output beam on the input facet, wherein the control circuit is electrically coupled to the drive mechanism and is operable to:
-
apply an advancement waveform to the drive mechanism using the first resistive element to perform an advancement operation during which the drive mechanism advances the adaptive optics in an adjustment direction; and apply a dither waveform to the drive mechanism using the second resistive element to perform a dither operation during which the drive mechanism oscillates the adaptive optics back and forth in first and second directions to oscillate a position of the output beam on the input facet; wherein a polarity of the advancement waveform corresponds with the adjustment direction and the first and second resistive elements are such that a rising edge time and a falling edge time of the dither waveform is greater than a rising edge time and a falling edge time of the advancement waveform.
-
-
18. A method for controlling a drive mechanism coupled to an object, the method comprising:
-
applying an advancement waveform to the drive mechanism using a first resistive element of a control circuit to perform an advancement operation during which the drive mechanism advances the adaptive optics in an adjustment direction; and applying a dither waveform to the drive mechanism using a second resistive element of the control circuit to perform a dither operation during which the drive mechanism oscillates the adaptive optics back and forth in first and second directions to oscillate a position of the output beam on the input facet; wherein a polarity of the advancement waveform corresponds with the adjustment direction, and the first and second resistive elements are such that a rising edge time and a falling edge time of the dither waveform is greater than a rising edge time and a falling edge time of the advancement waveform. - View Dependent Claims (19)
-
Specification