Optoelectronic device having attenuating lens block and source monitoring

Patent metadata

Field	Value
Publication number	US-12468097-B2
Application number	US-202218061356-A
Country	US
Kind code	B2
Filing date	Dec 2, 2022
Priority date	Jun 2, 2022
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

An optoelectronic device is used with an optical fiber for data transmission and has a transmitter mounted on a printed circuit board (PCB) to emit light. A collimation lens on a lens block receives the light incident thereto. A microstructure on a reflective surface of the lens block has sections that reflect the light into attenuated portions. A focusing lens on the lens block focuses a first attenuated portion from first sections of the reflective surface to the optical fiber. Meanwhile, second sections of the reflective surface reflect a second attenuated portion to another reflective surface on the lens block. The second attenuated portion passes out of a refractive surface on the lens block to an receiver, which is mounted on the PCB adjacent the transmitter. The second attenuated portion of the light can be used to monitor the optical output of the transmitter.

First claim

What is claimed is:

1 . An optoelectronic device used with at least one optical fiber, the optoelectronic device comprising:
at least one transmitter disposed in the optoelectronic device and being configured to emit light; a lens block disposed in the optoelectronic device adjacent the at least one transmitter; an input on the lens block being configured to receive the light emitted from the at least one transmitter incident thereto; a first section of a first reflective surface on the lens block being configured to reflect a first attenuated portion of the light; a first output on the lens block being configured to output the first attenuated portion of the light to the at least one optical fiber; a second section of the first reflective surface being configured to reflect a second attenuated portion of the light; a second output on the lens block being configured to output the second attenuated portion of the light; and at least one receiver disposed in the optoelectronic device adjacent the lens block and being configured to receive the second attenuated portion of the light propagated from the second output, wherein the second output of the lens block comprises:
a second reflective surface opposing the first reflective surface, the second reflective surface being configured to reflect the second attenuated portion of the light; and
a refractive surface adjacent to a cavity being configured to refract the second attenuated portion of the light into the cavity to outside the lens block to the at least one receiver;
wherein:
the first reflective surface is disposed at an angled plane relative to the input and the first output;
the first section of the first reflective surface comprises first divisions of the first reflective surface disposed on the angled plane;
the second section of the first reflective surface comprises second divisions of the first reflective surface disposed at an angle from the angled plane; and
the first divisions and the second divisions are arranged in a checkered pattern across a portion of the first reflective surface.

2 . The optoelectronic device of claim 1 , wherein the input comprises at least one collimation lens on the lens block being configured to collimate the light emitted from the at least one transmitter incident thereto; and wherein the first output comprises at least one focusing lens on the lens block being configured to focus the first attenuated portion of the light to the at least one optical fiber.

3 . The optoelectronic device of claim 2 , wherein the at least one collimation lens is formed on a first surface of the lens block or is attached on the first surface; and wherein the at least one focusing lens is formed on a second surface of the lens block or is attached on the second surface.

4 . The optoelectronic device of claim 1 , wherein the first reflective surface is disposed at an angled plane relative to the input and the first output; and wherein the first section of the first reflective surface comprises first divisions of the first reflective surface disposed on the angled plane.

5 . The optoelectronic device of claim 1 , further comprises a printed circuit board disposed in the optoelectronic device and having the at least one transmitter, the at least one receiver, and the lens block mounted thereon.

6 . The optoelectronic device of claim 5 , wherein the at least one receiver is mounted on the printed circuit board adjacent the at least one transmitter; and wherein the lens block is mounted on the printed circuit board over the at least one transmitter and the at least one receiver.

7 . The optoelectronic device of claim 1 , wherein the second divisions are disposed at the angle being configured to reflect the second attenuated portion of the light to the second reflective surface, the second reflective surface being configured to reflect the second attenuated portion of the light.

8 . The optoelectronic device of claim 1 , wherein the at least one transmitter comprises a VCSEL; and wherein the at least one receiver comprises a photodiode configured to monitor output of the VCSEL.

9 . An active optical cable having the optoelectronic device of claim 1 .

10 . A lens block for routing light from a transmitter to an optical fiber, the lens block comprising:
an input on the lens block being configured to receive the light emitted from the transmitter incident thereto; a first section of a first reflective surface on the lens block being configured to reflect a first attenuated portion of the light from the input; a first output on the lens block being configured to output the first attenuated portion of the light from the first reflective surface to the optical fiber; a second section of the first reflective surface being configured to reflect a second attenuated portion of the light from the input; and a second reflective surface on the lens block being configured to reflect the second attenuated portion of the light from the first reflective surface; and a second output on the lens block being configured to output the second attenuated portion of the light from the second reflective surface to a reference receiver, wherein:
a refractive surface adjacent to a cavity is configured to refract the second attenuated portion of the light into the cavity to outside the lens block to the reference receiver;
the first reflective surface is disposed at an angled plane relative to the input and the first output;
the first section of the first reflective surface comprises first divisions of the first reflective surface disposed on the angled plane;
the second section of the first reflective surface comprises second divisions of the first reflective surface disposed at an angle from the angled plane; and
the first divisions and the second divisions are arranged in a checkered pattern across a portion of the first reflective surface.

11 . The lens block of claim 10 , wherein the input comprises a collimation lens on the lens block being configured to collimate the light emitted from the transmitter incident thereto; and wherein the first output comprises a focusing lens on the lens block being configured to focus the first attenuated portion of the light to the optical fiber.

12 . An optoelectronic device used with at least one optical fiber, the optoelectronic device comprising:
at least one transmitter disposed in the optoelectronic device and being configured to emit light; a lens block disposed in the optoelectronic device adjacent the at least one transmitter; an input on the lens block being configured to receive the light emitted from the at least one transmitter incident thereto; a first section of a first reflective surface on the lens block being configured to reflect a first attenuated portion of the light; a first output on the lens block being configured to output the first attenuated portion of the light to the at least one optical fiber; a second section of the first reflective surface being configured to reflect a second attenuated portion of the light: a second output on the lens block being configured to output the second attenuated portion of the light; and at least one receiver disposed in the optoelectronic device adjacent the lens block and being configured to receive the second attenuated portion of the light propagated from the second output, wherein the second output of the lens block comprises:
a second reflective surface opposing the first reflective surface, the second reflective surface being configured to reflect the second attenuated portion of the light; and
a refractive surface adjacent to a cavity being configured to refract the s

Assignees

• Ii Vi Delaware Inc

Inventors

• Zhang Mengfei
• Xie Yichun
• Zhang Ranran
• Shao Cuiyan
• Li Yang
• Wu Wen
• Yang Hui

Classifications

• G02B6/4261

  Packages with mounting structures to be pluggable or detachable, e.g. having latches or rails · CPC title

• G02B6/4286

  Optical modules with optical power monitoring · CPC title

• G02B6/4292

  the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements · CPC title

• G02B6/4246

  Bidirectionally operating package structures · CPC title

• G02B6/428

  containing printed circuit boards [PCB] · CPC title