# US 2025/0158733 A1 · Telecommunication system based on spatial multiplexing of optical channels

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- Number: US 2025/0158733 A1
- Document ID: US20250158733A1
- Status: Published application
- Kind: A1
- Application number: 18/835,008
- Filed: 2023-03-29
- Published: 2025-05-15
- Earliest claimed: 2022-03-30
- Assignees: Peta Optik S. L.
- Applicants: Peta Optik S. L.
- Inventors: Aquiles PATERNOTTRE ECHEVERRIA
- Web page: https://patentgrep.com/patent/US20250158733A1

## CPC

- G02F 1/0102: {Constructional details, not otherwise provided for in this subclass}
- H04J 14/05: {Spatial multiplexing systems}
- H04N 7/22: Adaptations for optical transmission
- H04B 10/11: Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- 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
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04B: TRANSMISSION

## Abstract

A telecommunication system is based on spatial multiplexing of optical cables and uses optical space connected modulation (OSCM) to establish optical telecommunication links, where multiple optical communication channels are established with a single optical system. The system comprises: An OSCM transmitter system (1), a communication channel (11), and an OSCM receiver system (2). The OSCM transmitter system (1) includes a data input port (3), an OSCM modulator system (4), a generic light source (8), and an optical transmitter system (10). The OSCM modulator system (4) includes a processor system (5), and a spatial modulator (7). The OSCM receiver system (2) includes an optical receiver system (12), and an OSCM demodulator system (14). The OSCM demodulator system (14) includes an image sensor (13) and a processor system (15). The system allows multiple transmission channels to be formed using a single optical system.

## Claims

### Claim 1

A telecommunications system based on spatial multiplexing of optical channels, comprising:
an OSCM transmitter system (1) including:
a data input port (3) to the OSCM transmitter system (1), which receives bits to be transmitted.
an OSCM modulator system (4), including:
a processor system (5), which receives the bits to be transmitted from a controller (6) connected to the data input port (3), responsible for mapping the bits to symbols and generating electrical signals necessary to produce an appropriate symbol.
a spatial modulator (7) containing a series of pixels in which the symbols to be transmitted are modulated;
a generic light source (8) that generates a beam of light (9) which, when passing through the pixels of the spatial modulator (7), will produce a modulation of each of the channels, generating the symbols to be transmitted;
an optical transmitter system (10) configured to maximise a signal power in the OSCM modulated optical channel multiplex to the OSCM receiver system (2);
a communication channel (11);
an OSCM receiver system (2) containing:
an optical receiver system (12) configured to create an image of the OSCM spatial modulator (7) on an image sensor (13); or, if a diffraction technique has been used in the transmitting optical system, to diffract a received light signal in order to project the received light signal onto the image sensor (13) according to wavelengths of the received light signal; and
an OSCM demodulator system (14), including:
an image sensor (13) that receives the optical signal from the optical receiver system (12), and extracts the symbols into electrical signals that are sent to a processor system (15); and
wherein the processor system (15) is configured to receive the electrical signals from the image sensor (13) in a time sequence for each of the symbols, and produces a de-mapping process of those symbols to bits which are delivered to a controller (16) of an output port (17) of the OSCM receiver system (2) data.

### Claim 2 (depends on 1)

The telecommunications system based on spatial multiplexing of optical channels according to claim 1, wherein the optical transmitter system (10) includes a condenser optical system (14) configured to send a highest signal power to the receiver.

### Claim 3 (depends on 1)

The telecommunications system based on spatial multiplexing of optical channels according to claim 1 wherein in that the optical receiver system (12) includes a convergent optical system configured to form images (24) and (25) of the modulated pixels (18) and (19) of the transmitting system onto the image sensor (16) of the receiving system.

### Claim 4 (depends on 1)

The telecommunications system based on spatial multiplexing of optical channels according to claim 1, wherein the optical receiver system (12) includes a convergent optical system with optical lens function.

### Claim 5 (depends on 1)

The telecommunications system based on spatial multiplexing of optical channels according to claim 1, wherein the optical transmitter system (10) and the optical receiver system (12) each include at least one of: lenses, mirrors, prism systems, diffraction gratings, numerical aperture limiters, diaphragms, diffusers, or a combination thereof.

### Claim 6 (depends on 2)

The telecommunications system based on spatial multiplexing of optical channels according to claim 2, wherein the condenser optical system (14) is further configured to send the highest signal power to a boost system for use in wireless links.

### Claim 7 (depends on 4)

The telecommunications system based on spatial multiplexing of optical channels according to claim 4, wherein the optical receiver system (12) further includes one or more downstream lenses to magnify or de-magnify the image, for use in wireless optical links.