Abstract
A transmitter optical subassembly (TOSA) has been developed for a 100-Gbit/s Ethernet system for a long optical transmission distance over a 40-km single-mode fiber (SMF). To obtain a high optical output power and a high dynamic extinction ratio, the TOSA consists of two two-channel distributed feedback laser diode array chips integrated with electro-absorption modulators (EADFB laser array chips) with a 2 x 1 multimode interference (MMI) optical coupler and a polarization beam combiner for wavelength multiplexing. The TOSA is 8.7 mm x 28.7 mm x 6.5 mm including an LC-type receptacle. The TOSA has a twin collimator path for two EADFB laser array chips. The wavelength multiplexer consists of a mirror, a half-wavelength plate, and a polarization beam combiner. The TOSA could improve the optical output power by around 2 dB compared with a TOSA with a four-channel EADFB laser array chip and a 4 x 1 MMI optical coupler. An optical modulation amplitude of over 0.5 dBm and a mask margin exceeding 21% were obtained for each lane when all lanes were operated simultaneously with an EA modulator driving voltage of 1.5 V at a bit rate of 25.78125 Gbit/s, which fully satisfies the 100GBASE-ER4 specifications. We demonstrated error-free operation for an SMF transmission of over 40 km. Moreover, we confirmed that the TOSA was capable of error-free SMF transmission over 60 km with a power penalty of less than 1.4 dB.
| Original language | English |
|---|---|
| Article number | 7050237 |
| Pages (from-to) | 1985-1992 |
| Number of pages | 8 |
| Journal | Journal of Lightwave Technology |
| Volume | 33 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2015 May 15 |
| Externally published | Yes |
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Keywords
- 100 Gbit/s Ethernet
- Distributed feedback laser
- electro-absorption modulator
- polarization
- transmitter
- transmitter optical subassembly (TOSA)
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Transmitter Optical Subassembly Using a Polarization Beam Combiner for 100 Gbit/s Ethernet over 40-km Transmission. / Ohyama, Takaharu; Ohki, Akira; Takahata, Kiyoto; Ito, Toshio; Nunoya, Nobuhiro; Mawatari, Hiroyasu; Fujisawa, Takeshi; Kanazawa, Shigeru; Iga, Ryuzo; Sanjoh, Hiroaki.
In: Journal of Lightwave Technology, Vol. 33, No. 10, 7050237, 15.05.2015, p. 1985-1992.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Transmitter Optical Subassembly Using a Polarization Beam Combiner for 100 Gbit/s Ethernet over 40-km Transmission
AU - Ohyama, Takaharu
AU - Ohki, Akira
AU - Takahata, Kiyoto
AU - Ito, Toshio
AU - Nunoya, Nobuhiro
AU - Mawatari, Hiroyasu
AU - Fujisawa, Takeshi
AU - Kanazawa, Shigeru
AU - Iga, Ryuzo
AU - Sanjoh, Hiroaki
PY - 2015/5/15
Y1 - 2015/5/15
N2 - A transmitter optical subassembly (TOSA) has been developed for a 100-Gbit/s Ethernet system for a long optical transmission distance over a 40-km single-mode fiber (SMF). To obtain a high optical output power and a high dynamic extinction ratio, the TOSA consists of two two-channel distributed feedback laser diode array chips integrated with electro-absorption modulators (EADFB laser array chips) with a 2 x 1 multimode interference (MMI) optical coupler and a polarization beam combiner for wavelength multiplexing. The TOSA is 8.7 mm x 28.7 mm x 6.5 mm including an LC-type receptacle. The TOSA has a twin collimator path for two EADFB laser array chips. The wavelength multiplexer consists of a mirror, a half-wavelength plate, and a polarization beam combiner. The TOSA could improve the optical output power by around 2 dB compared with a TOSA with a four-channel EADFB laser array chip and a 4 x 1 MMI optical coupler. An optical modulation amplitude of over 0.5 dBm and a mask margin exceeding 21% were obtained for each lane when all lanes were operated simultaneously with an EA modulator driving voltage of 1.5 V at a bit rate of 25.78125 Gbit/s, which fully satisfies the 100GBASE-ER4 specifications. We demonstrated error-free operation for an SMF transmission of over 40 km. Moreover, we confirmed that the TOSA was capable of error-free SMF transmission over 60 km with a power penalty of less than 1.4 dB.
AB - A transmitter optical subassembly (TOSA) has been developed for a 100-Gbit/s Ethernet system for a long optical transmission distance over a 40-km single-mode fiber (SMF). To obtain a high optical output power and a high dynamic extinction ratio, the TOSA consists of two two-channel distributed feedback laser diode array chips integrated with electro-absorption modulators (EADFB laser array chips) with a 2 x 1 multimode interference (MMI) optical coupler and a polarization beam combiner for wavelength multiplexing. The TOSA is 8.7 mm x 28.7 mm x 6.5 mm including an LC-type receptacle. The TOSA has a twin collimator path for two EADFB laser array chips. The wavelength multiplexer consists of a mirror, a half-wavelength plate, and a polarization beam combiner. The TOSA could improve the optical output power by around 2 dB compared with a TOSA with a four-channel EADFB laser array chip and a 4 x 1 MMI optical coupler. An optical modulation amplitude of over 0.5 dBm and a mask margin exceeding 21% were obtained for each lane when all lanes were operated simultaneously with an EA modulator driving voltage of 1.5 V at a bit rate of 25.78125 Gbit/s, which fully satisfies the 100GBASE-ER4 specifications. We demonstrated error-free operation for an SMF transmission of over 40 km. Moreover, we confirmed that the TOSA was capable of error-free SMF transmission over 60 km with a power penalty of less than 1.4 dB.
KW - 100 Gbit/s Ethernet
KW - Distributed feedback laser
KW - electro-absorption modulator
KW - polarization
KW - transmitter
KW - transmitter optical subassembly (TOSA)
UR - http://www.scopus.com/inward/record.url?scp=84926392650&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84926392650&partnerID=8YFLogxK
U2 - 10.1109/JLT.2015.2402676
DO - 10.1109/JLT.2015.2402676
M3 - Article
AN - SCOPUS:84926392650
VL - 33
SP - 1985
EP - 1992
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
SN - 0733-8724
IS - 10
M1 - 7050237
ER -