Ams
US008837869B2
(12) United States Patent Akutsu et a].
(54)
SOA-PLC HYBRID INTEGRATED POLARIZATION DIVERSITY CIRCUIT AND METHOD FOR MANUFACTURING THE SAME
(56)
References Cited
FOREIGN PATENT DOCUMENTS 2001-272560 A 2002-311267 A
JP JP
(Continued)
U.S.C. 154(b) by 55 days. (21) Appl. No .: 13/735,601
International Search Report and Written Opinion issued May 22, 2012 in PCT/JP2012/000662 with English translation of categories of cited documents.
Prior Publication Data
(Continued)
May 16,2013
Primary Examiner * Akm Enayet Ullah (74) Attorney, A gent, or Firm * Oblon,
Continuation of application No. PCT/J P20 1 2/ 000662,
(51)
(52)
Int. Cl. G02B 6/27 G02B 6/125 H01S 5/042 H04J14/06 US. Cl.
ABSTRACT
PLC hybrid integrated polarization diversity circuit including a PLC-PBS chip and an SOA-COS whose respective
(JP) ............................... .. 2011-021814
waveguides are coupled to each other. The PLC-PBS chip includes: ?rst and second optical waveguides; a Mach-Ze hnder interferometer circuit; and a half-wave plate placed in
the ?rst optical waveguide which TM mode light is split into.
(2006.01) (2006.01) (2006.01) (2006.01)
The SOA-COS includes: a third optical waveguide connected to the ?rst optical waveguide; a fourth optical waveguide connected to the second optical waveguide; and an SOA formed in at least one of the third and fourth optical
USPC .............................. .. 385/11; 385/14; 359/344
(58)
(57)
The invention of the present application provides an SOA
Foreign Application Priority Data Feb. 3, 2011
Spivak,
McClelland, Maier & Neustadt, L.L.P.
?led on Feb. 1, 2012.
(30)
2013 in PCT/JP2012/000662. 2012 in PCT/JP2012/000662.
Related US. Application Data
(63)
International Preliminary Report on Patentability issued Aug. 15,
English language translation of the Written Opinion issued May 22,
Jan. 7, 2013
US 2013/0121632 A1
10/2001 10/2002
OTHER PUBLICATIONS
Subject to any disclaimer, the term of this patent is extended or adjusted under 35
Filed:
Okayama et a1. ............. .. 385/11 Hwang et a1. ................... .. 385/2
(Continued)
(73) Assignee: Furukawa Electric Co., Ltd., Tokyo (J P)
(22) (65)
7/1992 9/1996
5,133,028 A * 5,555,326 A *
Nara, Tokyo (JP); Masaki Funabashi,
Tokyo (JP); Noriyuki Yokouchi, Tokyo (JP); Hideaki Hasegawa, Tokyo (JP)
Sep. 16, 2014
U.S. PATENT DOCUMENTS
(71) Applicant: Furukawa Electric Co., Ltd., Tokyo (JP) Inventors: Takeshi Akutsu, Tokyo (JP); Kazutaka (72)
Notice:
US 8,837,869 B2
(10) Patent N0.: (45) Date of Patent:
Field of Classi?cation Search USPC ........ .. 385/10, 11, 12, 13, 14, 15, 16; 398/65;
359/325, 344, 346, 333; 372/92, 94, 372/ 108
waveguides. One end of the third optical waveguide and one end of the fourth optical waveguide are connected to a U-tum
optical waveguide, the one ends being not connected to the
?rst optical waveguide and the second optical waveguide,
respectively.
See application ?le for complete search history.
7 Claims, 14 Drawing Sheets
100
Unpol.
103 110a 110
101
109a 109
102
100111113“ 1121 1
108
I
/
// r/Ams
T
N114
\\ l
\
10881) 1083112 OUT
106
105
US 8,837,869 B2 Page 2 (56)
References Cited
FOREIGN PATENT DOCUMENTS
U.S. PATENT DOCUMENTS 6,033,126 A * 6,104,850 A *
3/2000 Omori et al. .................. .. 385/88 8/2000 Dong ..... .. 385/29
7,738,527 B2 *
6/2010
He ................................ .. 372/94
7,916,984 B2 *
3/2011
Kim et a1. ..................... .. 385/14
*
8’280’200 B2 8,643,943
*
2003-207668 A
7/2003
2005-157163 A
6/2005
JP W0
2008-275708 A WO 2006/013928 A1
11/2008 2/2006
OTHER PUBLICATIONS
.
10/2012 D01 et 31' '
B2 *
2002/0146217 A1
JP JP
2/2014
10/2002
Todt
.......... ..
385/2 .
359/346
Nobuhara et a1. ............. .. 385/84
zoos/0123234 A1
600% Karlie et al‘
2008/0031566 A1
2/2008 Matsubara et a1.
2008/0123701 A1 *
5/2008
He ................................ .. 372/23
2011/0038036 A1 *
2/2011
Todt ......................... .. 359/341.1
Ken Morito, et :11, “Record High Saturation Power (+22 dBm) and . . . . . . ,, Low N01se Figure (5.7 dB) Polarization-Insens1t1ve SOA Module , _ IEEE Photonics Technology Letters, vol. 17, No. 6, Feb. 2005, pp. 1298-1309 * Cited by examiner
US. Patent
Sep.16,2014
szwemsg . 02
\Q:
US 8,837,869 B2
Sheet10f14
m:\/ £2); _ /
\8:@998?K\N2\\ J \ /
NW: 2%: 9&2N: \
~
\ // E
j/\\\f> @2m2
2:
W :82
GI v
poNownorw?
P30
Joacz
US. Patent
Sep. 16, 2014
Sheet 2 0f 14
US 8,837,869 B2
FIG. 2 103
109a
'
' /
g
I
104/ T
1ana1O8a
112
/ /
/.
fvm
\ \' \'_
N114
——>A’ ;
'
-->B‘
US. Patent
Sep. 16, 2014
Sheet 3 0f 14
US 8,837,869 B2
FIG. 3A 109a 301 [10%
3%! >1
7/////// FIG. 3B 104
/302
US. Patent
Sep. 16, 2014
Sheet 4 0f 14
US 8,837,869 B2
FIG. 4 108a
401 402 403
'/
108a
\1 402 401 403
\\\\\\\“ FIG. 5A 304%»
\
/\,114
V
/\
106
V
J
105
FIG. 5B 501\/-\
L
Y
106
/\
V_/
105
US. Patent
Sep. 16, 2014
Sheet 5 0f 14
US 8,837,869 B2
FIG. 6 103 1
110a
102
109a
/
l
JfPLC
\ 611k
_
11Gb
102
/
1
10%
107
/
/
NS-."
(12) United States Patent Akutsu et a].
(54)
SOA-PLC HYBRID INTEGRATED POLARIZATION DIVERSITY CIRCUIT AND METHOD FOR MANUFACTURING THE SAME
(56)
References Cited
FOREIGN PATENT DOCUMENTS 2001-272560 A 2002-311267 A
JP JP
(Continued)
U.S.C. 154(b) by 55 days. (21) Appl. No .: 13/735,601
International Search Report and Written Opinion issued May 22, 2012 in PCT/JP2012/000662 with English translation of categories of cited documents.
Prior Publication Data
(Continued)
May 16,2013
Primary Examiner * Akm Enayet Ullah (74) Attorney, A gent, or Firm * Oblon,
Continuation of application No. PCT/J P20 1 2/ 000662,
(51)
(52)
Int. Cl. G02B 6/27 G02B 6/125 H01S 5/042 H04J14/06 US. Cl.
ABSTRACT
PLC hybrid integrated polarization diversity circuit including a PLC-PBS chip and an SOA-COS whose respective
(JP) ............................... .. 2011-021814
waveguides are coupled to each other. The PLC-PBS chip includes: ?rst and second optical waveguides; a Mach-Ze hnder interferometer circuit; and a half-wave plate placed in
the ?rst optical waveguide which TM mode light is split into.
(2006.01) (2006.01) (2006.01) (2006.01)
The SOA-COS includes: a third optical waveguide connected to the ?rst optical waveguide; a fourth optical waveguide connected to the second optical waveguide; and an SOA formed in at least one of the third and fourth optical
USPC .............................. .. 385/11; 385/14; 359/344
(58)
(57)
The invention of the present application provides an SOA
Foreign Application Priority Data Feb. 3, 2011
Spivak,
McClelland, Maier & Neustadt, L.L.P.
?led on Feb. 1, 2012.
(30)
2013 in PCT/JP2012/000662. 2012 in PCT/JP2012/000662.
Related US. Application Data
(63)
International Preliminary Report on Patentability issued Aug. 15,
English language translation of the Written Opinion issued May 22,
Jan. 7, 2013
US 2013/0121632 A1
10/2001 10/2002
OTHER PUBLICATIONS
Subject to any disclaimer, the term of this patent is extended or adjusted under 35
Filed:
Okayama et a1. ............. .. 385/11 Hwang et a1. ................... .. 385/2
(Continued)
(73) Assignee: Furukawa Electric Co., Ltd., Tokyo (J P)
(22) (65)
7/1992 9/1996
5,133,028 A * 5,555,326 A *
Nara, Tokyo (JP); Masaki Funabashi,
Tokyo (JP); Noriyuki Yokouchi, Tokyo (JP); Hideaki Hasegawa, Tokyo (JP)
Sep. 16, 2014
U.S. PATENT DOCUMENTS
(71) Applicant: Furukawa Electric Co., Ltd., Tokyo (JP) Inventors: Takeshi Akutsu, Tokyo (JP); Kazutaka (72)
Notice:
US 8,837,869 B2
(10) Patent N0.: (45) Date of Patent:
Field of Classi?cation Search USPC ........ .. 385/10, 11, 12, 13, 14, 15, 16; 398/65;
359/325, 344, 346, 333; 372/92, 94, 372/ 108
waveguides. One end of the third optical waveguide and one end of the fourth optical waveguide are connected to a U-tum
optical waveguide, the one ends being not connected to the
?rst optical waveguide and the second optical waveguide,
respectively.
See application ?le for complete search history.
7 Claims, 14 Drawing Sheets
100
Unpol.
103 110a 110
101
109a 109
102
100111113“ 1121 1
108
I
/
// r/Ams
T
N114
\\ l
\
10881) 1083112 OUT
106
105
US 8,837,869 B2 Page 2 (56)
References Cited
FOREIGN PATENT DOCUMENTS
U.S. PATENT DOCUMENTS 6,033,126 A * 6,104,850 A *
3/2000 Omori et al. .................. .. 385/88 8/2000 Dong ..... .. 385/29
7,738,527 B2 *
6/2010
He ................................ .. 372/94
7,916,984 B2 *
3/2011
Kim et a1. ..................... .. 385/14
*
8’280’200 B2 8,643,943
*
2003-207668 A
7/2003
2005-157163 A
6/2005
JP W0
2008-275708 A WO 2006/013928 A1
11/2008 2/2006
OTHER PUBLICATIONS
.
10/2012 D01 et 31' '
B2 *
2002/0146217 A1
JP JP
2/2014
10/2002
Todt
.......... ..
385/2 .
359/346
Nobuhara et a1. ............. .. 385/84
zoos/0123234 A1
600% Karlie et al‘
2008/0031566 A1
2/2008 Matsubara et a1.
2008/0123701 A1 *
5/2008
He ................................ .. 372/23
2011/0038036 A1 *
2/2011
Todt ......................... .. 359/341.1
Ken Morito, et :11, “Record High Saturation Power (+22 dBm) and . . . . . . ,, Low N01se Figure (5.7 dB) Polarization-Insens1t1ve SOA Module , _ IEEE Photonics Technology Letters, vol. 17, No. 6, Feb. 2005, pp. 1298-1309 * Cited by examiner
US. Patent
Sep.16,2014
szwemsg . 02
\Q:
US 8,837,869 B2
Sheet10f14
m:\/ £2); _ /
\8:@998?K\N2\\ J \ /
NW: 2%: 9&2N: \
~
\ // E
j/\\\f> @2m2
2:
W :82
GI v
poNownorw?
P30
Joacz
US. Patent
Sep. 16, 2014
Sheet 2 0f 14
US 8,837,869 B2
FIG. 2 103
109a
'
' /
g
I
104/ T
1ana1O8a
112
/ /
/.
fvm
\ \' \'_
N114
——>A’ ;
'
-->B‘
US. Patent
Sep. 16, 2014
Sheet 3 0f 14
US 8,837,869 B2
FIG. 3A 109a 301 [10%
3%! >1
7/////// FIG. 3B 104
/302
US. Patent
Sep. 16, 2014
Sheet 4 0f 14
US 8,837,869 B2
FIG. 4 108a
401 402 403
'/
108a
\1 402 401 403
\\\\\\\“ FIG. 5A 304%»
\
/\,114
V
/\
106
V
J
105
FIG. 5B 501\/-\
L
Y
106
/\
V_/
105
US. Patent
Sep. 16, 2014
Sheet 5 0f 14
US 8,837,869 B2
FIG. 6 103 1
110a
102
109a
/
l
JfPLC
\ 611k
_
11Gb
102
/
1
10%
107
/
/
NS-."
