# US 9,882,336 B2 · Optical module

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- Number: US 9,882,336 B2
- Document ID: US9882336B2
- Status: Granted
- Kind: B2
- Application number: 15/477,920
- Filed: 2017-04-03
- Published: 2017-07-20
- Granted: 2018-01-30
- Earliest claimed: 2015-09-29
- Assignees: Hisense Broadband Multimedia Technologies Co., Ltd.
- Applicants: Hisense Broadband Multimedia Technologies Co., Ltd.; Hisense Broadband Multimedia Technologies, Ltd.
- Inventors: Qiang Zhang; Qisheng Zhao; Shihai Yang
- Web page: https://patentgrep.com/patent/US9882336B2

## CPC

- H01S 3/0085: {Modulating the output, i.e. the laser beam is modulated outside the laser cavity}
- H01S 3/1305: {Feedback control systems}
- H01S 3/1398: {by using a supplementary modulation of the output}
- H01S 5/0085: {for modulating the output, i.e. the laser beam is modulated outside the laser cavity}
- H04B 10/5051: {using a series, i.e. cascade, combination of modulators}
- H04B 10/541: {Digital intensity or amplitude modulation}
- H04B 10/564: Power control
- H01S 5/06213: {Amplitude modulation}
- 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
- H04B: TRANSMISSION

## Abstract

The disclosure provides an optical module, including a laser, the laser including a light emitting region and a modulation region, and light emitted by the light emitting region emitting toward the modulation region; a first driver circuit, the first driver circuit being connected to the light emitting region, so that the light emitting region emits light with adjusted optical power; and a second driver circuit, the second driver circuit being connected to the modulation region, so that the modulation region changes the optical power of the light emitted from the light emitting region.

## Claims

### Claim 1

An optical module, comprising:
a laser comprising a light source, a first modulation region, and a second modulation region, wherein:
the light source is configured to emit a light beam,
the first modulation region is configured to receive the light beam from the light source, modulate an optical power of the light beam and deliver the light beam to the second modulation region, and
the second modulation region is configured to receive the light beam from the first modulation region, modulate the optical power of the light beam from the first modulation region, and deliver the light beam;
a first driver circuit comprising a modulation circuit, wherein:
the modulation circuit is connected to the first modulation region, and
the modulation circuit is configured to drive the first modulation region according to a first amplitude-adjusting signal from a system end; and
a second driver circuit connected to the second modulation region, wherein:
the second driver circuit is configured to drive the second modulation region according to a second amplitude-adjusting signal from the system end.

### Claim 2 (depends on 1)

The optical module according to claim 1, wherein:
the modulation circuit is configured to adjust the optical power of the light beam by driving the first modulation region.

### Claim 3 (depends on 2)

The optical module according to claim 2, wherein:
the first driver circuit further comprises a bias circuit connected to the light source, wherein the bias circuit is configured to drive the light source to emit the light beam with a stable optical power.

### Claim 4 (depends on 3)

The optical module according to claim 3, wherein:
the second driver circuit is configured to control the second modulation region to adjust the optical power of the light beam by driving the second modulation region.

### Claim 5

An optical module comprising:
a laser comprising a light source, a first modulation region, and a second modulation region, wherein:
the light source is configured to emit a light beam,
the first modulation region is configured to receive the light beam from the light source, modulate an optical power of the light beam and deliver the light beam to the second modulation region, and
the second modulation region is configured to receive the light beam from the first modulation region, modulate the optical power of the light beam from the first modulation region, and deliver the light beam;
a first driver circuit comprising a modulation circuit and a bias circuit, wherein:
the modulation circuit is connected to the first modulation region,
the modulation circuit is configured to drive the first modulation region to adjust the optical power of the light beam according to a first amplitude-adjusting signal from a system end, and
the bias circuit is connected to the light source and configured to drive the light source to emit the light beam with a stable optical power; and
a second driver circuit connected to the second modulation region and configured to control the second modulation region to adjust the optical power of the light beam by driving the second modulation region, wherein:
the second driver circuit is configured to drive the second modulation region according to a second amplitude-adjusting signal from the system end.

### Claim 6 (depends on 5)

The optical module according to claim 5, wherein:
a frequency of the first amplitude-adjusting signal is lower than a frequency of the second amplitude-adjusting signal.

### Claim 7 (depends on 6)

The optical module according to claim 6, wherein the system end is an electronic controlling device externally connected to the optical module.

### Claim 8 (depends on 6)

The optical module according to claim 6, wherein the second driver circuit comprises a transconductance amplifier connected between the system end and the second modulation region.

### Claim 9 (depends on 6)

The optical module according to claim 6, wherein
the bias circuit outputs a current signal with adjustable amplitude to the light source;
the modulation circuit outputs a current signal with adjustable amplitude to the first modulation region; and
the second driver circuit outputs a current signal with adjustable amplitude to the second modulation region.

### Claim 10 (depends on 9)

The optical module according to claim 9, wherein:
the frequency of the first amplitude-adjusting signal is lower than 1 Gbps; and
the frequency of the second amplitude-adjusting signal is higher than 1 Gbps.

### Claim 11 (depends on 5)

The optical module according to claim 5, wherein
the first amplitude-adjusting signal is a voltage signal or a current signal; and
the second amplitude-adjusting signal is a voltage signal or a current signal.

### Claim 12 (depends on 11)

The optical module according to claim 11, wherein
the bias circuit outputs a current signal with adjustable amplitude to the light source;
the modulation circuit outputs a current signal with adjustable amplitude to the first modulation region; and
the second driver circuit outputs a current signal with adjustable amplitude to the second modulation region.