# US 2019/0173584 A1 · Optical devices including a high contrast grating lens

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- Number: US 2019/0173584 A1
- Document ID: US20190173584A1
- Status: Published application
- Kind: A1
- Application number: 16/250,381
- Filed: 2019-01-17
- Published: 2019-06-06
- Earliest claimed: 2015-11-16
- Assignees: Hewlett Packard Enterprise Development LP
- Applicants: Hewlett Packard Enterprise Development LP
- Inventors: Wayne Victor Sorin; MIchael Renne Ty Tan; David A. Fattal; Sagi Varghese Mathai
- Web page: https://patentgrep.com/patent/US20190173584A1

## CPC

- H04B 10/503: {Laser transmitters}
- G02B 5/1809: {with pitch less than or comparable to the wavelength}
- G02B 5/1842: {Gratings for image generation (G02B5/1847 takes precedence)}
- G02B 6/32: having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)}
- G02B 6/34: utilising prism or grating {(G02B6/293 takes precedence)}
- G02B 6/4206: {Optical features (G02B6/4207, G02B6/421 take precedence)}
- H01S 5/183: having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
- H04B: TRANSMISSION
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL

## Abstract

Techniques related to optical devices including a high contrast grating (HCG) lens are described herein. In an example, an optical device includes a transparent substrate. A laser emitter or detector at a first side of the transparent substrate to emit or detect a laser light transmitted via the transparent substrate. A HCG lens is at a second side of the transparent substrate to transmit and refract the laser light.

## Claims

### Claim 1

An optical device, comprising:
a transparent substrate;
a laser emitter or a detector at a first side of the transparent substrate to emit or detect a laser light transmitted via the transparent substrate; and
a high contrast grating HCG lens at a second side of the transparent substrate to transmit and refract the laser light.

### Claim 2 (depends on 1)

The device of claim 1, wherein, the HCG lens is to collimate a divergent laser light.

### Claim 3 (depends on 1)

The device of claim 1, wherein, the HCG lens is to focus the laser light.

### Claim 4 (depends on 1)

The device of claim 1, wherein, the HCG lens is to tilt the laser light.

### Claim 5

(canceled)

### Claim 6 (depends on 1)

The device of claim 1, wherein the HCG lens includes resonant structures configured to control laser transmission and refraction.

### Claim 7

An optical communication device, comprising:
a transparent substrate;
a vertical-cavity surface emitting laser VCSEL integrated at a first side of the transparent substrate to emit a modulated laser light into the transparent substrate, the laser light being modulated for transmitting information;
an optical waveguide to implement optical communications to a remote device via transmission of the modulated laser light; and
a HCG lens integrated at a second side of the transparent substrate to:
receive the modulated laser light from the transparent substrate, and
transmit and refract the modulated laser light into an optical input of the optical waveguide.

### Claim 8

(canceled)

### Claim 9 (depends on 7)

The device of claim 7, wherein the VCSEL and the HCG conforms a sender, the remote device comprising a receiver including:
another transparent substrate;
a laser detector at a first side of the another transparent substrate;
a HCG lens integrated at a second side of the transparent substrate to:
receive the modulated laser light from the optical waveguide, and
transmit and refract the modulated laser light from an optical output of the optical waveguide towards the laser detector via the another transparent substrate.

### Claim 10 (depends on 7)

The device of claim 7, wherein the optical communication device forms part of a wavelength-division multiplexing WDM communication link.

### Claim 11 (depends on 7)

The device of claim 7, further including an array of the VCSELs and an array of the HCG lens in a corresponding configuration for implementing an array of optical communication channels.

### Claim 12

A method of manufacturing an optical device, the method comprising:
integrating a laser emitter or detector at a first side of a transparent substrate;
integrating a HCG lens at a second side of the transparent substrate to define an optical path coupling the laser emitter or detector and the HCG lens via the transparent substrate.

### Claim 13 (depends on 12)

The method of claim 12, wherein a laser emitter is integrated at the transparent substrate forming a vertical-cavity surface-emitting laser (VCSEL).

### Claim 14 (depends on 12)

The method of claim 12, wherein a detector is integrated at the transparent substrate to detect laser light coupled into the detector via the substrate and the HCG lens.

### Claim 15 (depends on 12)

The method of claim 12, further comprising optically coupling an optical waveguide to the laser diode via the substrate and the HCG lens.

### Claim 16 (depends on 1)

The device of claim 1, wherein a separation layer provides a refractive index difference between the HCG lens and the substrate to enhance resonant optical effects.

### Claim 17 (depends on 1)

The device of claim 1, wherein the HCG lens receives the laser light from the transparent substrate, and transmits and refracts the modulated laser light into an optical input of an optical waveguide.

### Claim 18 (depends on 7)

The device of claim 7, wherein, the HCG lens is to collimate a divergent laser light, focus the laser light, or tilt the laser light.

### Claim 19 (depends on 12)

The method of claim 12, further comprising:
forming a separation layer between the transparent substrate and the laser emitter or detector at the first side of the transparent substrate, the separation layer being comprised of a low refractive index material.

### Claim 20 (depends on 12)

The method of claim 12, wherein the HCG lens includes resonant structures configured to control laser transmission and refraction.