Optical module comprising a reflective surface at a preset angle for reflecting light from light transmitting lenses to light receiving lenses

Patent metadata

Field	Value
Publication number	US-11418262-B2
Application number	US-202016810965-A
Country	US
Kind code	B2
Filing date	Mar 6, 2020
Priority date	Mar 8, 2019
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

An optical module includes a substrate, an optical device, and a plurality of light transmitting elements and a plurality of light receiving elements disposed between the optical device and the substrate. The optical device includes a device body, and an optical transceiver interface and a lens array that are disposed on the device body. The lens array is configured to optically couple the plurality of light transmitting elements with the optical transceiver interface, and optically couples the optical transceiver interface with the plurality of light receiving elements. An auxiliary lens is disposed on an optical coupling path between the plurality of light transmitting elements and the optical transceiver interface or between the optical transceiver interface and the plurality of light receiving elements.

First claim

What is claimed is:

1. An optical module comprising:
a substrate;
an optical device; and
a plurality of light transmitting elements and a plurality of light receiving elements disposed on the substrate, and between the optical device and the substrate,
wherein the optical device is disposed above the plurality of light transmitting elements and the plurality of light receiving elements,
the optical device comprises a device body, and an optical transceiver interface and a lens array that are disposed on the device body,
the optical device is configured so that an optical signal transmitted from the plurality of light transmitting elements passes through the optical transceiver interface before leaving the optical module, and an optical signal transmitted from outside of the optical module passes through the optical transceiver interface before reaching the plurality of light receiving elements,
the lens array is configured to optically couple the plurality of light transmitting elements with the optical transceiver interface, and to optically couple the optical transceiver interface with the plurality of light receiving elements,
the lens array comprises:
a plurality of light transmitting lenses arranged along a same direction as the plurality of light transmitting elements and located on a first surface of the device body facing the plurality of light transmitting elements, light transmitted from each of the plurality of light transmitting elements entering into a corresponding one of the plurality of light receiving light transmitting lenses;
a plurality of light receiving lenses arranged along the same direction as the plurality of light receiving elements and located on the first surface of the device body facing the plurality of light receiving elements, light entering into each of the plurality of light receiving elements coming from a corresponding one of the plurality of light receiving light receiving lenses;
a reflective surface arranged at a preset angle relative to the first surface, the reflective surface reflecting light from each of the plurality of light transmitting lenses to the optical transceiver interface or reflecting light from the optical transceiver interface to the plurality of light receiving lenses;
an optical filter arranged parallel to the reflective surface, the optical filter reflecting light from the optical transceiver interface to the plurality of light receiving lenses and letting pass light reflected by the reflective surface from each of the plurality of light transmitting lenses, or reflecting light from each of the plurality of light transmitting lenses to the optical transceiver interface and letting pass light from the optical transceiver interface;
a plurality of optical transceiver lenses arranged in the same direction as the plurality of light transmitting lenses and formed on a second surface of the device body, the plurality of optical transceiver lenses receiving reflected light from the reflective surface or the optical filter and guiding light that enters the optical transceiver interface to the optical filter or the reflective surface; and
at least one auxiliary lens disposed on an optical coupling path between the plurality of light transmitting elements and the optical transceiver interface, or on an optical coupling path between the optical transceiver interface and the plurality of light receiving elements.

2. The optical module of claim 1 , wherein the reflective surface and the transmitting lenses correspond in their locations, the reflective surface reflects a second optical signal to the transceiver lenses, and the auxiliary lens is disposed between the receiving lenses and the optical filter.

3. The optical module of claim 1 , wherein a first inclined-surface recess is disposed on the device body, the first inclined-surface recess has a mounting surface and a recessed space that extends below the mounting surface, the optical filter is mounted on the mounting surface and extends into the recessed space, and light that enters the optical device through the optical transceiver interface passes through the recessed space before reaching the optical filter.

4. The optical module of claim 3 , wherein the recessed space comprises a bottom wall parallel to the first surface and a side wall connected to the bottom wall, and the plurality of auxiliary lenses are disposed on the bottom wall.

5. The optical module of claim 4 , wherein a second inclined-surface recess is also arranged on the device body, and the reflective surface is formed by a side wall of the second inclined-surface recess.

6. The optical module of claim 1 , wherein the optical module further comprises a driver chip that drives the light transmitting elements and a TIA (transimpedance amplifier) chip that drives the light receiving elements, and the plurality of light transmitting elements, driver chip, plurality of light receiving elements, and TIA chip are all mounted on the substrate.

7. The optical module of claim 6 , wherein the substrate is a PCB (printed circuit board) including a portion filled with high density through-hole copper, and the plurality of light transmitting elements, driver chip, plurality of light receiving elements, and TIA chip are all mounted on the portion filled with high density through-hole copper.

8. The optical module of claim 6 , wherein a portion of the substrate is embedded with a copper plate, and the plurality of light transmitting elements, driver chip, plurality of light receiving elements, and TIA chip are all mounted on the copper plate.

9. The optical module of claim 6 , wherein the device body comprises a body recess, a recess bottom of the body recess forms the first surface, and at least the plurality of light transmitting elements and the plurality of light receiving elements are positioned correspond to the body recess.

10. The optical module of claim 6 , wherein a substrate recess is arranged on the substrate, and at least the plurality of light transmitting elements and the plurality of light receiving elements are located in the substrate recess.

Assignees

• Innolight Tech Suzhou Ltd

Inventors

• Han Ming
• Xiao Yue

Classifications

• G02B6/4214

  the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device (G02B6/4246 takes precedence) · CPC title

• H04B10/40 Primary

  Transceivers · CPC title

• G02B6/4207

  with optical elements reducing the sensitivity to optical feedback (anti-reflection devices specially adapted for lasers, see H01S3/0064) · CPC title

• G02B3/005

  arranged along a single direction only, e.g. lenticular sheets (G02B3/0043 takes precedence) · CPC title

• G02B6/4206 Primary

  Optical features (G02B6/4207, G02B6/421 take precedence) · CPC title