Angled periodic segmented waveguide for spot size conversion with reduced return loss
A spot size converter may include a tapered periodic segmented waveguide (PSW). The tapered PSW may include a plurality of waveguide segments defined by a plurality of gaps between the plurality of waveguide segments. The plurality of gaps may be at one or more angles that are not substantially parallel to a direction of a width of the tapered PSW. The direction of the width of the tapered PSW may be substantially perpendicular to a direction in which light passes through the tapered PSW.
1. A device comprising:
a periodic segmented waveguide (PSW) for passing light received along an optical axis through a length of the PSW,
the length of the PSW including a plurality of waveguide segments defined by a plurality of gaps,
the length extending, along the optical axis, from a first end of the PSW to a second, opposite end of the PSW, and
each gap, of the plurality of gaps, being at a non-perpendicular angle relative to the optical axis.
2. The device of claim 1 , where the PSW is a tapered PSW.
3. The device of claim 1 , where a first gap, of the plurality of gaps, is oriented in a first direction relative to a direction of a width of the PSW and a second gap, of the plurality of gaps, is oriented in a second, different direction relative to the direction of the width of the PSW.
4. The device of claim 1 , where each non-perpendicular angle, associated with each respective gap of the plurality of gaps, is the same.
5. The device of claim 1 , where the PSW is designed to perform two-dimensional spot size conversion for the light.
6. The device of claim 1 , further comprising at least one of:
a waveguide for transmitting the light from the PSW, or
a waveguide for receiving the light from the PSW.
7. The device of claim 1 , where
the PSW is a first PSW, and
the device further includes:
a second PSW to receive the light from the first PSW or transmit the light to the first PSW,
where the second PSW is a tapered PSW.
8. A periodic segmented waveguide (PSW) for passing light received along an optical axis through a length of the PSW, the PSW comprising:
a plurality of waveguide segments, located along the length of the PSW, defined by a plurality of gaps,
the length extending, along the optical axis, from a first end of the PSW to a second, opposite end of the PSW, and
each gap, of the plurality of gaps, being at a non-perpendicular angle relative to the optical axis.
9. The PSW of claim 8 , where a first gap, of the plurality of gaps, is oriented in a first direction relative to a direction of a width of the PSW and a second gap, of the plurality of gaps, is oriented in a second, different direction relative to the direction of the width of the PSW.
10. The PSW of claim 8 , where each non-perpendicular angle, associated with each respective gap of the plurality of gaps, is the same.
11. The PSW of claim 8 , where the PSW is designed to perform two-dimensional spot size conversion for the light.
12. The PSW of claim 8 , where the PSW is a tapered PSW.
13. The PSW of claim 8 , where the PSW at least one of:
transmits the light to a first waveguide, or
receives the light from a second waveguide.
14. The PSW of claim 8 , where the PSW is included in a planar lightwave circuit.
15. A method comprising:
receiving, using a periodic segmented waveguide (PSW), light; and
passing, using the PSW, the light received along an optical axis through a length of the PSW,
the length of the PSW including a plurality of waveguide segments defined by a plurality of gaps,
the length extending, along the optical axis, from a first end of the PSW to a second, opposite end of the PSW, and
each gap, of the plurality of gaps, being at a non-perpendicular angle relative to the optical axis.
16. The method of claim 15 , where a first gap, of the plurality of gaps, is oriented in a first direction relative to a direction of a width of the PSW and a second gap, of the plurality of gaps, is oriented in a second, different direction relative to the direction of the width of the PSW.
17. The method of claim 15 , further comprising:
expanding or contracting the light in a first dimension and a second dimension.
18. The method of claim 15 , where each non-perpendicular angle, associated with each respective gap of the plurality of gaps, is the same.
19. The method of claim 15 , further comprising at least one of:
transmitting the light from the PSW to a first waveguide; or
receiving the light from a second waveguide.
20. The method of claim 19 , where at least one of the first waveguide or the second waveguide is a tapered PSW.