US 10,908,359 B2Granted

Adjustable wide-spectrum wavelength-insensitive directional coupler

OwnerLiangliang Wang, Jiashun Zhang +7inventors

InventorsLiangliang Wang, Jiashun Zhang, Junming An, Xiaojie Yin, Jianguang Li, Hongjie Wang, Yuanda Wu, Yue Wang, Xiongwei Hu

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Abstract

An adjustable wide-spectrum wavelength-insensitive directional coupler, comprising a substrate (100). A first-stage directional coupling structure (1), a phase-shifting structure (2), and a second-stage directional coupling structure (3) are sequentially connected and disposed on the substrate (100). The phase-shifting structure (2) comprises a phase-shifting curved waveguide, a phase-shifting straight waveguide (22), and a third modulation component (26), wherein the third modulation component (26) is disposed on the phase-shifting curved waveguide. One end of the phase-shifting curved waveguide is connected to an output end of a directional coupled waveguide I (16) of the first-stage directional coupling structure (1), and the other end of the phase-shifting curved waveguide is connected to an input end of a directional coupled waveguide III (30) of the second-stage directional coupling structure (3). One end of the phase-shifting straight waveguide (22) is connected to an output end of a directional coupled waveguide II (17) of the first-stage directional coupling structure (1), and the other end of the phase-shifting straight waveguide (22) is connected to an input end of a directional coupled waveguide IV (31) of the second-stage directional coupling structure (3). The adjustable wide-spectrum wavelength-insensitive directional coupler achieves wide-spectrum wavelength-insensitivity, a wide spectrum of splitting-ratio adjustment and low loss, and is of a compact size for easy integration with other devices.

Claims10

Dependent claims

An adjustable wide-spectrum wavelength-insensitive directional coupler, characterized in that:

comprising a substrate (100);
a first-stage directional coupling structure (1), a phase-shifting structure (2), and a second-stage directional coupling structure (3) sequentially disposed on said substrate (100);
wherein said phase-shifting structure (2) comprises a phase shifting arc-shaped waveguide, a phase shifting straight waveguide (22) and a third modulating component (26), wherein said third modulating component (26) is disposed on said phase shifting arc-shaped waveguide;
said phase shifting arc-shaped waveguide has one end connected to an output terminal of a directional coupling waveguide I (16) of said first-stage directional coupling structure (1), said phase shifting arc-shaped waveguide has another end connected to an input terminal of a directional coupling waveguide III (30) of said second-stage directional coupling structure (3), said phase shifting straight waveguide (22) has one end connected to an output terminal of a directional coupling waveguide II (17) of said first-stage directional coupling structure (1), said phase shifting straight waveguide (22) has another end connected to an input terminal of a directional coupling waveguide IV (31) of said second-stage directional coupling structure (3),
said phase shifting arc-shaped waveguide comprises a first phase shifting arc-shaped waveguide (21), a second phase shifting arc-shaped waveguide (23), a third phase shifting arc-shaped waveguide (24), and a fourth phase shifting arc-shaped waveguide (25), said first phase shifting arc-shaped waveguide (21) has one end connected to said output terminal of said directional coupling waveguide I (16), said first phase shifting arc-shaped waveguide (21) has another end connected to one end of said second phase shifting arc-shaped waveguide (23), said second phase shifting arc-shaped waveguide (23) has another end connected to one end of said third phase shifting arc-shaped waveguide (24), said third phase shifting arc-shaped waveguide (24) has another end connected to one end of said fourth phase shifting arc-shaped waveguide (25), said fourth phase shifting arc-shaped waveguide (25) has another end connected to said input terminal of said directional coupling waveguide III (30);
an arc formed by connecting said first phase shifting arc-shaped waveguide (21) and said second phase shifting arc-shaped waveguide (23) is symmetrical to an arc formed by connecting said third phase shifting arc-shaped waveguide (24) and said fourth phase shifting arc-shaped waveguide (25), and a bending direction of said first phase shifting arc-shaped waveguide (21) is opposite to a bending direction of said second phase shifting arc-shaped waveguide (23).

3 more elements

An adjustable wide-spectrum wavelength-insensitive directional coupler, characterized in that:

comprising a substrate (100);
a first-stage directional coupling structure (1), a phase-shifting structure (2), and a second-stage directional coupling structure (3) sequentially disposed on said substrate (100);
wherein said phase-shifting structure (2) comprises a phase shifting arc-shaped waveguide, a phase shifting straight waveguide (22) and a third modulating component (26), wherein said third modulating component (26) is disposed on said phase shifting arc-shaped waveguide;
said phase shifting arc-shaped waveguide has one end connected to an output terminal of a directional coupling waveguide I (16) of said first-stage directional coupling structure (1), said phase shifting arc-shaped waveguide has another end connected to an input terminal of a directional coupling waveguide III (30) of said second-stage directional coupling structure (3), said phase shifting straight waveguide (22) has one end connected to an output terminal of a directional coupling waveguide II (17) of said first-stage directional coupling structure (1), said phase shifting straight waveguide (22) has another end connected to an input terminal of a directional coupling waveguide IV (31) of said second-stage directional coupling structure (3),
said first-stage directional coupling structure 1 comprises a first input waveguide component and a second input waveguide component which are parallel to each other, said first input waveguide component comprises an input waveguide I (10), an arc-shaped waveguide I (12), an arc-shaped waveguide II (14), a directional coupling waveguide I (16) and a first modulation component I (18);
said input waveguide I (10) has one end constructed as an optical entrance port, said input waveguide I (10) has another end in contact connection with one end of said arc-shaped waveguide I (12), said arc-shaped waveguide I (12) has another end in contact connection with one end of said arc-shaped waveguide II (14), said arc-shaped waveguide II (14) has another end in contact connection with one end of said directional coupling waveguide I (16), said directional coupling waveguide I (16) has another end in contact connection with one end of said first phase shifting arc-shaped waveguide (21), said first modulation component I (18) is disposed on said substrate (100) and is located at an outer side of said directional coupling waveguide I (16);
said second input waveguide component comprises an input waveguide II (11), an arc-shaped waveguide III (13), an arc-shaped waveguide IV (15), a directional coupling waveguide II (17), and a first modulating component II (19), said input waveguide II (11) has one end constructed as another optical port, said input waveguide II (11) has another end in contact connection with one end of said arc-shaped waveguide III (13), said arc-shaped waveguide III (13) has another end in contact connection with one end of said arc-shaped waveguide IV (15), said arc-shaped waveguide IV (15) has another end in contact connection with one end of said directional coupling waveguide II (17), said directional coupling waveguide II (17) has another end in contact connection with one end of said phase-shifting straight waveguide (22), said first modulation component II (19) is disposed on said substrate (100) and is located at an outer side of said directional coupling waveguide II (17).

4 more elements

An adjustable wide-spectrum wavelength-insensitive directional coupler, characterized in that:

comprising a substrate (100);
a first-stage directional coupling structure (1), a phase-shifting structure (2), and a second-stage directional coupling structure (3) sequentially disposed on said substrate (100);
wherein said phase-shifting structure (2) comprises a phase shifting arc-shaped waveguide, a phase shifting straight waveguide (22) and a third modulating component (26), wherein said third modulating component (26) is disposed on said phase shifting arc-shaped waveguide;
said phase shifting arc-shaped waveguide has one end connected to an output terminal of a directional coupling waveguide I (16) of said first-stage directional coupling structure (1), said phase shifting arc-shaped waveguide has another end connected to an input terminal of a directional coupling waveguide III (30) of said second-stage directional coupling structure (3), said phase shifting straight waveguide (22) has one end connected to an output terminal of a directional coupling waveguide II (17) of said first-stage directional coupling structure (1), said phase shifting straight waveguide (22) has another end connected to an input terminal of a directional coupling waveguide IV (31) of said second-stage directional coupling structure (3),
said second-stage directional coupling structure (3) comprises a first output waveguide component and a second output waveguide component which are parallel to each other, said first output waveguide component includes an output waveguide I (38), an arc-shaped waveguide V (36), an arc-shaped waveguide VI (34), a directional coupling waveguide III (30) and a second modulation component I (32);
said output waveguide I (38) has one end constructed as an optical output port, and said output waveguide I (38) has another end in contact connection with one end of said arc-shaped waveguide V (36), said arc-shaped waveguide V (36) has another end in contact connection with one end of said arc-shaped waveguide VI (34), said arc-shaped waveguide VI (34) has another end in contact connection with one end of said directional coupling waveguide III (30), said directional coupling waveguide III (30) has another end in contact connection with one end of said first phase shifting arc-shaped waveguide (21), said second modulation component I (32) is disposed on said substrate (100) and is located at an outer side of said directional coupling waveguide III (30);
said second output waveguide component includes an output waveguide II (39), an arc-shaped waveguide VII (37), an arc-shaped waveguide VIII (35), a directional coupling waveguide IV (31), and a second modulating component II (33);
said output waveguide II (39) has one end constructed as another optical output port, said output waveguide II (39) has another end in contact connection with one end of said arc-shaped waveguide VII (37), said arc-shaped waveguide VII (37) has another end in contact connection with one end of said arc-shaped waveguide VII (35), said arc-shaped waveguide VII (35) has one end in contact connection with one end of said directional coupling waveguide IV (31), said directional coupling waveguide IV 31 has another end in contact connection with another end of said phase-shifting straight waveguide (22), said second modulation component II (33) is disposed on said substrate (100) and is located at an outer side of said directional coupling waveguide IV (31).

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/629,920Filed 13 Aug 2018
Priority: CN 2017 1 069093514 Aug 2017
Published: US 2020/0142130 A17 May 2020
Granted: 2 Feb 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G02B 6/283
Using mechanical machining means for shaping of the couplers, e.g. grinding or polishing: couplers being tunable or adjustable
G02B 6/3827
Characterised by form or shape: wrap-back connectors, i.e. containing a fibre having an U shape
G02F 1/0147
For the control of the intensity, phase, polarisation or colour: based on thermo-optic effects
G02F 1/035
Based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect: in an optical waveguide structure