Optical signal modulation apparatus and system

Patent metadata

Field	Value
Publication number	US-10027417-B2
Application number	US-201715461263-A
Country	US
Kind code	B2
Filing date	Mar 16, 2017
Priority date	Sep 17, 2014
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

Embodiments of the present invention provide an optical signal modulation apparatus and system. The optical signal modulation apparatus includes: a laser, where each of at least one first output end and at least one second output end of the laser is connected to an electro-absorption modulator (EAM), the laser is configured to generate at least two optical signals, where at least one of the optical signals is sent to at least one EAM by using the at least one first output end, and at least one of the optical signals is sent to at least one EAM by using the at least one second output end, and each EAM is configured to modulate a received electrical signal onto the received optical signal for outputting. The apparatus has a simple structure and less complex production.

First claim

What is claimed is:

1. An optical signal modulation apparatus, comprising:
a laser, wherein each of at least one first output end and at least one second output end of the laser is connected to an electro-absorption modulator (EAM), the at least one first output end of the laser is disposed on one side of the laser, and the at least one second output end is disposed on another side of the laser; and
at least one optical reflection apparatus, wherein an optical reflection apparatus is connected to an output end of an EAM connected to a first output end;
wherein the laser is configured to generate at least two optical signals, wherein at least one of the at least two optical signals is sent to at least one EAM by using the at least one first output end, and at least one of the at least two optical signals is sent to at least one EAM by using the at least one second output end;
wherein each EAM is configured to receive an electrical signal that carries channel data, receive an optical signal sent by the laser, and modulate the received electrical signal onto the received optical signal for outputting; and
wherein the optical reflection apparatus is configured to reflect an optical signal that is output at the first output end so that the reflected optical signal is in a same direction as an optical signal that is output at a second output end.

2. The modulation apparatus according to claim 1 , wherein the optical reflection apparatus comprises a first reflection prism and a second reflection prism;
wherein the first reflection prism is configured to reflect, to the second reflection prism, the optical signal that is output at the first output end; and
wherein the second reflection prism is configured to reflect the optical signal reflected by the first reflection prism so that the optical signal reflected by the second reflection prism is in the same direction as the optical signal that is output at the second output end.

3. The modulation apparatus according to claim 2 , wherein the optical reflection apparatus further comprises a first glass component and a second glass component;
wherein the first glass component is configured to provide an optical channel between the first reflection prism and the second reflection prism; and
wherein the second glass component is configured to output the optical signal reflected by the second reflection prism.

4. The modulation apparatus according to claim 1 , further comprising:
at least one optical path compensation component, wherein an optical path compensation component is connected to an output end of an EAM connected to the second output end, and the optical path compensation component is configured to perform optical path compensation on the optical signal that is output at the second output end so that a compensated optical signal is synchronized with the reflected optical signal that is output by the optical reflection apparatus.

5. The modulation apparatus according to claim 4 , wherein the optical path compensation component comprises:
a third reflection prism, a fourth reflection prism, a fifth reflection prism, a sixth reflection prism, a third glass component, a fourth glass component, a fifth glass component, and a sixth glass component;
wherein the third glass component, the third reflection prism, the fourth glass component, the fourth reflection prism, the fifth reflection prism, the fifth glass component, the sixth reflection prism, and the sixth glass component are connected in sequence, the third glass component is connected to the output end of the EAM connected to the second output end, and the sixth glass component is configured to output the optical signal obtained after optical path compensation; and
wherein a total length of a transmission path of an optical signal in the third reflection prism, the fourth reflection prism, the fifth reflection prism, the sixth reflection prism, the third glass component, the fourth glass component, the fifth glass component, and the sixth glass component is a sum of lengths of the laser and two EAMs.

6. The modulation apparatus according to claim 1 , wherein a convex lens is disposed between each output end of each EAM connected to each first output end and each optical reflection apparatus, and each convex lens is configured to focus a respective optical signal that is output at the respective output end of the respective EAM connected to the respective first output end, and input the focused optical signal to a respective corresponding optical reflection apparatus.

7. The modulation apparatus according to claim 1 , wherein a convex lens is disposed between each output end of the laser and each corresponding EAM, and each convex lens is configured to focus a respective optical signal that is output at the respective output end of the laser, and input the focused optical signal to the respective corresponding EAM.

8. An optical signal modulation system, comprising:
an optical signal modulation apparatus comprising:
a laser, wherein each of at least one first output end and at least one second output end of the laser is connected to an electro-absorption modulator (EAM), the at least one first output end of the laser is disposed on one side of the laser, and the at least one second output end is disposed on another side of the laser opposite to the one side of the laser; and
at least one optical reflection apparatus, wherein an optical reflection apparatus is connected to an output end of an EAM connected to a first output end;
wherein the laser is configured to generate at least two optical signals, wherein at least one of the at least two optical signals is sent to at least one EAM by using the at least one first output end, and at least one of the at least two optical signals is sent to at least one EAM by using the at least one second output end;
wherein each EAM is configured to receive an electrical signal that carries channel data, receive an optical signal sent by the laser, and modulate the received electrical signal onto the received optical signal for outputting; and
wherein the optical reflection apparatus is configured to reflect an optical signal that is output at the first output end so that the reflected optical signal is in a same direction as an optical signal that is output at a second output end;

an optical polarization rotator; and
an optical polarization beam combiner (PBC);
wherein the optical polarization rotator is configured to perform polarization rotation processing on at least one optical signal that is output by the optical signal modulation apparatus, and output a processed optical signal to the PBC, wherein the at least one optical signal corresponds to at least one of the at least two optical signals; and
wherein the PBC is configured to combine the at least one optical signal that is processed by the optical polarization rotator and an optical signal that is not processed by the optical polarization rotator and that is output by the optical signal modulation apparatus, and input the combined optical signal to a fiber.

9. The modulation system according to claim 8 , further comprising at least one convex lens, disposed between an output end at which the optical signal modulation apparatus outputs the at least one optical signal and the optical polarization rotator, wherein each convex lens is configured to focus a respective optical signal that is output by the optical signal modulation apparatus, and input the focused optical signal to the optical polarization rotator.

10. The modulation system according to claim 8 , further comprising:
a reflection prism, configured to reflect, to the PBC, the at least one optical signal that is processed by the optical polarization r

Assignees

• Huawei Tech Co Ltd

Inventors

• Wang Yin
• Gao Lei
• Li Yanbo

Classifications

• H01S5/0265

  Intensity modulators (intra-cavity modulators H01S5/0625) · CPC title

• H01S5/1007

  Branched waveguides · CPC title

• H04B10/516 Primary

  Details of coding or modulation · CPC title

• H04B10/505

  using external modulation · CPC title

• H04B10/58

  Compensation for non-linear transmitter output · CPC title