Integrated vertical cavity surface emitting laser pair for high density data storage and method of fabrication
First Claim
1. An integrated vertical cavity surface emitting laser pair comprising:
- a high power vertical cavity surface emitting laser fabricated on a substrate element; and
a low power vertical cavity surface emitting laser fabricated on the substrate element and monolithically integrated with the high power vertical cavity surface emitting laser.
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Accused Products
Abstract
An integrated vertical cavity surface emitting laser (VCSEL) pair for use in an optical pickup head for high density optical storage applications and a method of fabrication. The VCSEL pair includes a high power VCSEL capable of emitting a power output of at least 15 mW and a low power VCSEL capable of emitting a power output in a range of 1-4 mW. A phase shift mask is integrated with the high power VCSEL to allow for a 180° shift in light emitted therethrough, thereby creating a reduced focal spot size for high density data write applications. The low power VCSEL emission is focused into a Gaussian beam profile for data read applications. The integrated VCSEL pair is utilized in an optical pickup head capable of high density read and write applications for both CDs and DVDs.
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Citations
26 Claims
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1. An integrated vertical cavity surface emitting laser pair comprising:
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a high power vertical cavity surface emitting laser fabricated on a substrate element; and a low power vertical cavity surface emitting laser fabricated on the substrate element and monolithically integrated with the high power vertical cavity surface emitting laser. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An integrated vertical cavity surface emitting laser pair comprising:
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a high power multimode vertical cavity surface emitting laser generating an emission along a path; and a low power single mode vertical cavity surface emitting laser, monolithically integrated with the high power vertical cavity surface emitting laser and generating an emission along a path. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of fabricating an integrated vertical cavity surface emitting laser pair including the steps of:
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providing a substrate having formed thereon a first mirror stack; disposing an active region and a second mirror stack on the first mirror stack; selectively etching through the second mirror stack, the active region and a portion of the first mirror stack thereby defining a high power vertical cavity surface emitting laser emitting light along a path and a low power vertical cavity surface emitting laser emitting light along a path separated by a defined space; and disposing on a surface of the second mirror stack of the high power vertical cavity surface emitting laser, a one-half wavelength phase shift mask. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification