CWOA-A1-L1-D Analog Technologies, Inc. LASER CONTROLLER FOR OPTICAL AMPLIFIERS Description This laser controller is designed for driving the pump laser in optical amplifiers, such as Raman amplifier and EDFA, with high stability and reliability. It drives the laser in four modes: constant current, constant laser power, constant output power, and constant gain. It also provides these protection functions: over current, over laser power, over output power, and over gain. Interface and Control Pin # Pin Name Type Description 1 2 3 4 5 6 7 8 9 10 11 GND ILIM OPLIM LPLIM GNLIM LIS OPS LPS GNS OPFB OPA Analog power Connect ADC and DAC ground to here. Analog input Analog input Analog input Analog input Analog input Analog input Analog input Analog input Laser current limit set, 0 to 2.5V. Optical output power limit set, 0 to 2.5V. Laser power limit set, 0 to 2.5V. Constant gain limit set, 0 to 2.5V. Laser current set, 0 to 2.5V. Optical output power set, 0 to 2.5V. Laser output power set, 0 to 2.5V. Constant gain set, 0 to 2.5V. Analog output Analog input Output photo diode feedback, 0 to 2.5V. Output photo diode anode, 0 to 2.5V. 12 13 LPFB LPA Analog output Analog input Laser photo diode feedback, 0 to 2.5V. Laser photo diode anode, 0 to 2.5V. 14 15 IPFB IPA Analog output Analog input Input photo diode feedback, 0 to 2.5V. Input photo diode anode, 0 to 2.5V. 16 17 2.5V LPGD Analog output Digital output 18 19 20 21 22 23 24 IPO LPO OPO OIO NC M1 M2 Analog output Analog output Analog output Analog output NC Digital input Digital input Voltage reference, 2.5V. Loop good, optical amplifier is working at the set mode. Input power output voltage, 0 to 2.5V. Laser power output voltage, 0 to 2.5V. Output power output voltage, 0 to 2.5V. Laser current output voltage, 0 to 2.5V. No connect. Mode set 1. Mode set 2. M1M2: 00 = constant current mode, 01 = constant laser power mode, 10 = constant output power mode, 11 = constant gain mode. Note Set by DAC or POT Set by DAC or POT Set by DAC or POT Set by DAC or POT Set by DAC or POT Set by DAC or POT Set by DAC or POT Set by DAC or POT Connect a resistor between these two pins to set the transimpedance Connect a resistor between these two pins to set the transimpedance Connect a resistor between these two pins to set the transimpedance To ADC To ADC To ADC To ADC 5 5 0 E . W eddell D riv e , S u ite 4 , S u n n y v a le, C A 9 4 0 8 9 , U . S . A . Tel.: (4 0 8 ) 7 4 7 -9 7 6 0 , F a x : (4 0 8 ) 7 4 7 -9 7 7 0 , W eb: w w w . a n a l o g t e c h n o l o g i e s . c o m Copyright 2001 – 2003, Analog Technologies, Inc. All Rights Reserved. CWOA-A1-L1-D Analog Technologies, Inc. 25 26 27 28 29 30 SDNG LDA GND PGND PGND VPS Digital input Analog output Analog power Power Power Power Shut down, negative logic: 0 = off. Laser diode anode. Analog ground, connect laser diode cathode to here. Power ground. Power ground. Power supply, 3.3V to 5V. The same as Pin 1. Specifications Part number: Operating temperature range: Control loop rise and fall time: Output settling time: Drive current stability (in current mode): Output power stability (in power mode): Output ripple current: Output current limit setting: Power supply voltage VPS: Maximum output current: Maximum output voltage: Size: 15 14 13 12 11 IPDAN IPDFB LPDAN LPDFB OPDAN 10 9 8 7 OPDFB CGS LPS OPS 6 5 4 LIS CGLM LPLM 3 2 OPLM LILM 1 GND 2.5V LOOPGD IPWO LPWO OPWO LIO NC M1 M2 SDNG LDAN GND PGND PGND VPS CWOA-A1-L1-D -25°C to +85°C <5uS <10uS <0.05% <0.05% <0.02% 0 to 0.5A 3.3V to 5.5V 0.5A VPS – 0.4V 25.5mm × 22mm × 4.2mm 16 17 18 19 20 Pin 1 21 22 23 24 25.5mm 25 26 27 28 29 30 Figure 1 Bottom View of CWOA-A1-L1-D 20mm Figure 2 Top View of CWOA-A1-L1-D 5 5 0 E . W eddell D riv e , S u ite 4 , S u n n y v a le, C A 9 4 0 8 9 , U . S . A . Tel.: (4 0 8 ) 7 4 7 -9 7 6 0 , F a x : (4 0 8 ) 7 4 7 -9 7 7 0 , W eb: w w w . a n a l o g t e c h n o l o g i e s . c o m Copyright 2001 – 2003, Analog Technologies, Inc. All Rights Reserved. CWOA-A1-L1-D Analog Technologies, Inc. 4.2mm 4.2mm 3mm 0.42mm 3.2mm 0.6mm 18mm 1.27mm Figure 3 End View of CWOA-A1-L1-D Figure 4 Side View of CWOA-A1-L1-D 1 2 1 GND 2 ILIM D 3 OPLIM 4 LPLIM 5 CGLIM 6 LIS 7 OPS 8 LPS 9 CGS 10 OPFB 11 OPA 12 LPFB C 13 LPA 14 IPFB 15 IPA GND VPS ILIM PGND OPLIM PGND LPLIM GND GNLIM LDA U1 LIS SDGN CWOA-A1-L1-D OPS M2 LPS M1 GNS NC OPFB OIO OPA OPO LPFB LPO LPA IPO IPFB LPGD IPA 2.5V 2.5V OPS 30 5 V (Input) 29 0 V (input) 28 27 EDFA Components GND 26 D1 LDA 2 IPA 25 1 2.5V SDGN EDFA Input Photodiode 24 M2 D2 23 M1 2 LPA 1 2.5V 22 EDFA Laser Photodiode 21 OIO 20 19 2 OPA IPO 17 2 LDA 1 GND EDFA Laser 2.5V GNLIM 2.5V D4 LPGD 16 1 EDFA Output Photodiode LPO 18 LIS D3 OPO LPILM OPLIM ILIM LPGD SDNG M2 M1 R8 300 2 3 3 3 3 3 3 3 R3 10K 1 R2 10K 1 1 R1 10K 2 1 B 2 1 IPFB 2.5V LPFB LPA OPFB OPA OPO GNS 3 W7 10K W8 10K W9 10K W10 10K D5 LED 1 2 R6 499 2 1 W6 10K 2 1 W5 10K 2 1 W4 10K 2 1 2 1 2 1 2 R7 499 S3 SW SPST S2 SW SPST S1 SW SPST 2 1 R5 499 2 R4 499 1 1 10K 10K 1 1 W3 3 W2 3 3 W1 10K 2 2 1 2 2 2 GND A Title Size Number B Date: File: 1 2 14-Mar-2003 C:\My Documents\Electronic1\Backup of MFLD1 3 Figure 5 Connecting to EDFA 5 5 0 E . W eddell D riv e , S u ite 4 , S u n n y v a le, C A 9 4 0 8 9 , U . S . A . Tel.: (4 0 8 ) 7 4 7 -9 7 6 0 , F a x : (4 0 8 ) 7 4 7 -9 7 7 0 , W eb: w w w . a n a l o g t e c h n o l o g i e s . c o m Copyright 2001 – 2003, Analog Technologies, Inc. All Rights Reserved.