Optical signal transmission device

Abstract

The present invention provides an optical signal transmission device comprising a light source, an optical component, a wavelength conversion element, a filter element, and a light receiver. The light source emits light to the wavelength conversion element, causing the wavelength conversion element to excite and emit mixed light to the filter element. The filter element filters out wavelengths of the light emitted by the light source and delivers the light to the light receiver. The range of one of the filtering wavelengths of the filter element includes the wavelength range of the light source, so that the filter element can filter out the light from the light source.

Claims

1. An optical signal transmission device for receiving a first signal, the optical signal transmission device comprising: a light source; an optical component comprising: a wavelength conversion element disposed on the light-emitting surface of the light source; a filter element disposed on the light-emitting surface of the wavelength conversion element; and a light receiver disposed on the light-emitting surface of the filter element; wherein, The light source emits a first ray of light to the wavelength conversion element in response to the first signal. A portion of the first ray of light excites the wavelength conversion element and mixes with the first ray of light to form a second ray of light. The second ray of light is incident on the filter element, which filters out the first ray of light to form a third ray of light. The light receiver receives the third ray of light and converts it into a second signal, which corresponds to the first signal. The wavelength of one of the light sources in the first ray of light is different from the wavelength of one of the excitation light sources in the wavelength conversion element, and the range of the filtering wavelength of one of the filter elements includes the range of the wavelength of the light source.

2. The optical signal transmission device as claimed in claim 1 further includes a light pattern control element disposed on the light-emitting surface of the wavelength conversion element, the light pattern control element receiving the second light ray, the light pattern control element including a plurality of refractive layers and allowing the second light ray with an incident angle of 0° to 40° to pass through.

3. The optical signal transmission apparatus as claimed in claim 2, wherein the optical pattern control element comprises a plurality of refractive layers, which are stacked intersecting each other to form a periodic structure.

4. The optical signal transmission device as claimed in claim 2, wherein the materials of the refractive layers are a combination of niobium pentoxide (Nb2O5) layer and silicon oxide (SiO2) layer or a combination of titanium oxide (TiO2) layer and silicon oxide (SiO2) layer.

5. The optical signal transmission apparatus as claimed in claim 1, wherein the light source comprises a plurality of light-emitting units, the optical receiver comprises a plurality of receiving units, and each of the light-emitting units corresponds to one of the receiving units.

6. The optical signal transmission device as claimed in claim 1, wherein the optical component further includes an optical waveguide element disposed on the light-emitting surface of the filter element, the optical receiver is disposed on the light-emitting surface of the optical waveguide element, and the third light ray passes through the optical waveguide element and is emitted to the optical receiver.

7. The optical signal transmission apparatus as claimed in claim 1, wherein the minimum wavelength of the excitation light is greater than the minimum wavelength of the light source, and the maximum wavelength of the excitation light is greater than the maximum wavelength of the light source.

8. The optical signal transmission apparatus as described in claim 7, wherein the wavelength range of the excitation light is 700nm to 800nm.

9. The optical signal transmission device as described in claim 8, wherein the wavelength range of the filter wavelength is 400nm~700nm or 800nm~1550nm.

10. The optical signal transmission device as claimed in claim 1 or 6, wherein the optical component further includes an auxiliary wavelength conversion element disposed between the wavelength conversion element and the filter element, wherein one of the auxiliary excitation wavelengths of the auxiliary wavelength conversion element is different from the excitation wavelength of the wavelength conversion element.

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