# US 12,009,629 B1 · Robotic system for acousto-optic transducer bonding

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- Number: US 12,009,629 B1
- Document ID: US12009629B1
- Status: Granted
- Kind: B1
- Application number: 18/379,093
- Filed: 2023-10-11
- Granted: 2024-06-11
- Earliest claimed: 2023-06-10
- Assignees: IntraAction Corp.
- Applicants: Khanh Le; John Lekavich; Bao Tran
- Inventors: Khanh Le; John Lekavich; Bao Tran
- Web page: https://patentgrep.com/patent/US12009629B1

## CPC

- H01S 3/117: using intracavity acousto-optic devices
- G02F 1/113: {Circuit or control arrangements}
- G02F 1/33: Acousto-optical deflection devices {(circuit or control arrangements therefor G02F1/113)}
- H01S 3/0621: {Coatings on the end-faces, e.g. input/output surfaces of the laser light}
- H01S 3/09415: {the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping}
- H01S 3/1611: {neodymium}
- 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
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

An acousto-optic deflector includes an optical element having a surface with one or more steps formed thereon; a conductive layer formed on the surface with the steps; one or more crystals secured to each step; and electrodes positioned on each surface of each crystal.

## Claims

### Claim 1

A device to deflect a laser beam, comprising:
an optical element having a plurality of steps each with a predetermined height, wherein the step height corresponds to a frequency response; and
one or more crystals or transducers on the steps, wherein the device receives an electrical input to deflect the laser at two or more frequencies and generates a sound field in the optical element to deflect a laser beam based on two or more frequencies received by a tuning element with a 1:1 balun, a 4:1 transformer, a capacitor, and an inductor.

### Claim 2 (depends on 1)

The device of claim 1, comprising wherein the inputs of the crystals or transducers are matched to a predetermined impedance.

### Claim 3 (depends on 1)

The device of claim 1, wherein the tuning element provides coupled to the transducers with an output impedance of 50 ohms.

### Claim 4 (depends on 1)

The device of claim 1, wherein the tuning element includes inductive and capacitive passive components.

### Claim 5 (depends on 1)

The device of claim 1, wherein the optical element comprises one of: germanium, tellurium dioxide (Te02), lithium niobate, PZT, fused silica, chalcogenide glasses, glass.

### Claim 6 (depends on 1)

The device of claim 1, wherein a tuning element matches a deflector output impedance at 40 MHz and at 60 MHz to a 50 ohm impedance.

### Claim 7 (depends on 1)

The device of claim 1, wherein the optical element is formed within a vacuum chamber using a temperature control system and bonded to a surface of a transducer to form an acousto-optical device (AOD).

### Claim 8 (depends on 1)

The device of claim 1, wherein the optical element comprises a conductive layer over the one or more steps.

### Claim 9 (depends on 7)

The device of claim 7, wherein the bonded transducer is cured within the vacuum chamber.

### Claim 10 (depends on 1)

The device of claim 1, wherein the optical element deflects an optical beam.

### Claim 11 (depends on 1)

The device of claim 1, wherein the optical element is processed by a robot or actuator during production.

### Claim 12 (depends on 11)

The device of claim 11, wherein the robot or actuator comprises a vacuum gripper configured to securely hold the transducer.

### Claim 13 (depends on 11)

The device of claim 11, wherein the robot or actuator comprises a dispensing system configured to bond the transducer and the AOD base.

### Claim 14 (depends on 11)

The device of claim 11, wherein the robot or actuator comprises a curing station within the vacuum chamber, providing controlled environmental conditions for curing an Indium epoxy.

### Claim 15

A device to deflect a laser beam, comprising:
an optical element having a plurality of steps each with a predetermined height, wherein the step height corresponds to a frequency response;
one or more crystals or transducers on the steps, wherein the device receives an electrical input to deflect the laser at two or more frequencies and generates a sound field in the optical element to deflect a laser beam based on two or more frequencies, wherein the optical element comprises a slanted end, wherein the slanted end comprises a compound angle to move reflected sound field out of a laser beam working range, wherein the slanted end forms a 30 degree angle measured from a long side of the optical element to a short side of the optical element, and wherein a surface of the slanted end comprises a 2 degree slope.