Tunable Filter based Optical Add/Drop Technology (TOADM) Jay - PowerPoint PPT Presentation

Tunable Filter based Optical Add/Drop Technology (TOADM) Jay Hsieh, Optoplex Corporation Fremont, CA Optoplex Confidential 1

Benefit of Tunability/Reconfig. network � Faster and remote provisioning � Bandwidth-on-demand  Better bandwidth utilization; transform bandwidth capacity to revenue generating services � Automated network reconfiguration and restoration  Flexibility, security and cost- effectiveness Optoplex Confidential 2

ROADM Optical Networks Intercity Intercity Optical core ROADM switch Metro Metro Metro Metro Customers Customers A Customers Customers B Source: AT&T Optoplex Confidential 3

ROADM Technologies � WB (wavelength blocker) + 2-port tunable filter � WSS (wavelength selective switch) � TOADM (tunable optical add/drop module) � WSS+ TOADM Optoplex Confidential 4

ROADM (1) (WB + 2-port tunable filters) WB In Express Out Loss >12 dB 1xM Couplers … … TF … … Arrays … … … … Drop Add Loss >10 dB Optoplex Confidential 5

Application of TF and TOADM In WB Express Out 1xM Couplers … … … … … 2-port TF Arrays … … … … … … Drop Drop Add Broadcast-and-Select 3-port TOADM ROADM Optoplex Confidential 6

ROADM (2) Wavelength Selective Switch (WSS) Add Channels Express In Loss ~5 dB Drop Channels Grating Demux + MEMS Switchs Optoplex Confidential 7

ROADM (3) 3-Port Tunable filter(TOADM) Add Channels In Express Out Loss ~3 dB Drop Channels Loss <4 dB Optoplex Confidential 8

ROADM (4) WSS + TOADM WSS In Express Out … … … … … … … … … … … … Drop Drop Drop Drop WSS re-groups inputs signals into 4 sets TOADM demux signals in each sub-set Optoplex Confidential 9

Tunable Filter Technology Comparison Passban High Ch. Technology d Flat- Athermal Latching 3-Port Isolation top Single cavity � � � � � (MEMS Based) Multi-cavity � � � � � (Thin-film based) Optoplex Confidential 10

TOADM Same size as a credit card Optoplex Confidential 11

Filter Tuning Mechanism Express channel d All wavelength θ λ drop λ drop = f ( n,d, θ ) Optoplex Confidential 12

TOADM Performance (1) Drop Channels (100 GHz 3-port, single channel) 0 -5 Insertion Loss (dB) -10 -15 -20 dB -25 -30 -35 -40 1525 1530 1535 1540 1545 1550 1555 1560 1565 nm Wavelength (nm) Optoplex Confidential 13

TOADM Performance (2) Express Channels (100 GHz 3-port, single channel) 0 -5 Insertion Loss (dB) -10 -15 -20 dB -25 -30 -35 -40 1525 1530 1535 1540 1545 1550 1555 1560 1565 Wavelength (nm) nm Optoplex Confidential 14

100 GHz Tunable Filter Performance (3) IL vs Channel Number 1.65 Drop Channel 1.60 Insertion Loss (dB) (100 GHz 3-port, single channel) 1.55 1.50 1.45 1.40 1.35 0 10 20 30 40 Channel Number Optoplex Confidential 15

100 GHz Tunable Filter Performance (4) Bandwidth vs Channel Number 1.1 0.9 Bandwidth (nm) Drop Channel 0.7 PB @ 0.5dB (100 GHz 3-port, SB @ 25dB single channel) 0.5 0.3 0.1 0 10 20 30 40 Channel Number Optoplex Confidential 16

100 GHz Tunable Filter Performance (5) flat top, high isolation Channel 20 (CW: 1561.42 nm) 0 -10 Insertion Loss (dB) Express -20 -30 Channels -40 -50 -60 1559.5 1560.5 1561.5 1562.5 1563.5 Channel 59 (CW: 1530.33 nm) Wavelength (nm) 0 -10 Insertion Loss (dB) -20 Drop -30 Channels -40 -50 -60 1528.2 1529.2 1530.2 1531.2 1532.2 Wavelength (nm) Optoplex Confidential 17

TOADM Performance (6) performance at various temperatures 0 -10 -20 Insertion Loss (dB) Drop Ch 39, -10C Exp Ch 39, -10C -30 Drop Ch 39, 5C Exp Ch 39, 5C -40 Drop Ch 39, 23C Exp Ch 39, 23C -50 Drop Ch 39, 45C Exp Ch 39, 45C -60 -70 1544 1545 1546 1547 1548 Wavelength (nm) Optoplex Confidential 18

Band-drop TOADM ( Band drop TOADM + colorless demux) Input Drop Demux Tunable Filter Colorless 4 Skip 0 Demux Express 4 Dropped Channels Optoplex Confidential 19

Band drop TOADM Performance (1) 100 G, 4-skip-0, drop channels Drop Channels (100 GHz 3-port, 4 skip 1) 4 skip 0 0 -5 Insertion Loss (dB) -10 -15 dB -20 -25 -30 -35 -40 1525 1530 1535 1540 1545 1550 1555 1560 1565 nm Wavelength (nm) Optoplex Confidential 20

Band drop TOADM Performance (2) Express Channels (100 GHz 3-port, 4 skip 1) 100G, 4-skip-0 express channels 0 0 -5 Insertion Loss (dB) -10 -15 -20 dB -25 -30 -35 -40 1525 1530 1535 1540 1545 1550 1555 1560 1565 Wavelength (nm) nm Optoplex Confidential 21

Summary � It has been proved that thin-film based tunable optical add/drop (TOADM) technologies provides a cost- effective, high performance, low technical risk solution for building a reconfigurable optical network. Optoplex Confidential 22