Optical transceiver implementing erbium doped fiber amplifier

Patent metadata

Field	Value
Publication number	US-2016103286-A1
Application number	US-201514878744-A
Country	US
Kind code	A1
Filing date	Oct 8, 2015
Priority date	Oct 10, 2014
Publication date	Apr 14, 2016
Grant date	—

Abstract

An optical transceiver that installs an optical modulator with the Mach-Zehnder type and made of primarily semiconductor materials, and an Erbium Doped Fiber Amplifier (EDFA) is disclosed. The EDFA and the MZ modulator, in addition to a wavelength tunable laser diode, an intelligent coherent receiver, and a polarization maintaining splitter, are installed within a compact case following the standard of CFP2.

First claim

What is claimed is:

1 . An optical transceiver that generates an output optical signal and receives an input optical signal, comprising:
an optical source for generating a continuous wave (CW) light; an optical splitter for splitting the CW light into two portions as maintaining a polarization of the CW light; an optical modulator for modulating one of the portions of the CW light split by the optical splitter and outputting a modulated optical signal; an optical receiver for interfering between the input optical signal and the another of the portions of the CW light; and an erbium doped fiber amplifier (EDFA) for amplifying the modulated optical signal generated by the optical modulator and outputting the output optical signal.

2 . The optical transceiver of claim 1 ,
wherein the optical source is a wavelength tunable optical source including a wavelength tunable laser diode (LD).

3 . The optical transceiver of claim 1 ,
wherein the optical modulator includes a modulating device primarily made of semiconductor materials.

4 . The optical transceiver of claim 1 ,
wherein the optical source, the optical splitter, the optical modulator, the optical receiver, and the EDFA are optically coupled with respective inner fibers.

5 . The optical transceiver of claim 4 ,
wherein the inner fibers include polarization maintaining fibers (PMF) for coupling the optical source, the optical splitter, the optical modulator, and the optical receiver.

6 . The optical transceiver of claim 4 wherein the inner fibers are connected with respective polarization maintaining connectors (PMCs).

7 . The optical transceiver of claim 6 ,
wherein the inner fibers connecting the optical source to the optical splitter, the optical splitter to the optical modulator, and the optical splitter to the optical receiver each provide a polarization maintain connectors (PMCs).

8 . The optical transceiver of claim 4 ,
wherein at least one of the inner fibers is once drawn outside of a housing, bent thereat, and pulled within the housing again.

9 . The optical transceiver of claim 8 ,
wherein the inner fibers are beat by respective radii greater than 15 mm.

10 . The optical transceiver of claim 1 ,
further comprising a housing to enclose the optical source, the optical splitter, the optical modulator, the optical receiver, and the EDFA, wherein the housing has dimensions following a CFP2 standard.

11 . The optical transceiver of claim 10 ,
wherein the housing has dimensions of 91.5 mm in a length, 41.5 mm in a width, and 12.4 mm in a height.

12 . The optical transceiver of claim 10 ,
wherein the housing includes a frame, a top housing, and a bottom housing assembled to each other to form a space where the optical source, the optical splitter, the optical modulator, the optical receiver, and the EDFA are enclosed therein, and wherein the EDFA is assembled on the bottom housing, and the optical modulator is fixed to the top housing.

13 . The optical transceiver of claim 12 ,
further comprising an optical receptacle having a port for transmitting the optical signal and another port for receiving the another optical signal, wherein the optical receptacle is integrally formed with the frame.

14 . The optical transceiver of claim 12 ,
further comprising an optical receptacle having a port for transmitting the optical signal and another port for receiving the another optical signal, wherein the optical receptacle is independent of the frame.

15 . The optical transceiver of claim 14 ,
further comprising a shield gasket to fill a gap formed between the optical receptacle and the frame.

Assignees

• Sumitomo Electric Industries

Inventors

• Matsui Takashi

Classifications

• G02B6/3812

  having polarisation-maintaining light guides (light guides having polarisation effects per se G02B6/105) · CPC title

• G02B6/3823

  containing surplus lengths, internal fibre loops (provisionally see also G02B6/444) · CPC title

• G02B6/4292

  the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements · CPC title

• G02B6/4256

  Details of housings · CPC title

• H01S3/1608

  erbium · CPC title