System for immersing at least one first user in a virtual or augmented reality comprising an immersion space, wherein said at least one first user can move, said system comprising: - an optical receiving device which can be carried by said first user, - at least one optical access point, - processing means comprising: - means for generating a first immersive multimedia stream intended for said first user according to the movements of the latter, - means for optically transmitting (T X O 1, TxO 2... TxO n) a multiplexed optical signal (λ 1, λ 2... λ n) to at least one of the optical access points comprising a) means for associating said first immersive multimedia stream with a first wavelength and b) multiplexing means configured to multiplex several immersive multimedia streams associated with separate wavelengths of which said first immersive multimedia stream associated with the first wavelength, so as to form said multiplexed optical signal (λ 1, λ 2... λ n), said at least one optical access point being arranged in said immersion space so as to form an optical cell extending in said immersion space, said optical receiving device comprising a) means for receiving the multiplexed optical signal (λ 1, λ 2... λ n) from said at least one optical access point via a wireless optical connection when said first user is situated in the optical cell, and b) filtering means configured to extract the first immersive multimedia stream intended for the first user from the multiplexed optical signal (λ 1, λ 2... λ n). - an optical receiving device which can be carried by said first user, - at least one optical access point, - processing means comprising: - means for generating a first immersive multimedia stream intended for said first user according to the movements of the latter, - means for optically transmitting (T X O 1, TxO 2... TxO n) a multiplexed optical signal (λ 1, λ 2... λ n) to at least one of the optical access points comprising a) means for associating said first immersive multimedia stream with a first wavelength and b) multiplexing means configured to multiplex several immersive multimedia streams associated with separate wavelengths of which said first immersive multimedia stream associated with the first wavelength, so as to form said multiplexed optical signal (λ 1, λ 2... λ n), said at least one optical access point being arranged in said immersion space so as to form an optical cell extending in said immersion space, - means for generating a first immersive multimedia stream intended for said first user according to the movements of the latter, - means for optically transmitting (T X O 1, TxO 2... TxO n) a multiplexed optical signal (λ 1, λ 2... λ n) to at least one of the optical access points comprising a) means for associating said first immersive multimedia stream with a first wavelength and b) multiplexing means configured to multiplex several immersive multimedia streams associated with separate wavelengths of which said first immersive multimedia stream associated with the first wavelength, so as to form said multiplexed optical signal (λ 1, λ 2... λ n), said at least one optical access point being arranged in said immersion space so as to form an optical cell extending in said immersion space,