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| Analog Technologies, Inc. CWOA-A1-L1-D 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 # 1 2 3 4 5 6 7 8 9 10 11 Pin Name GND ILIM OPLIM LPLIM GNLIM LIS OPS LPS GNS OPFB OPA Type Analog power Description Connect ADC and DAC ground to here. Note Analog input Analog input Analog input Analog input Analog input Analog input Analog input Analog input Analog output 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. 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. 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 16 17 18 19 20 21 22 23 24 2.5V LPGD IPO LPO OPO OIO NC M1 M2 Analog output Digital output 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. 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 (c) 2001 - 2003, Analog Technologies, Inc. All Rights Reserved. Analog Technologies, Inc. 25 26 27 28 29 30 SDNG LDA GND PGND PGND VPS Digital input Analog output Analog power Power Power Power CWOA-A1-L1-D 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: CWOA-A1-L1-D -25C to +85C <5uS <10uS <0.05% <0.05% <0.02% 0 to 0.5A 3.3V to 5.5V 0.5A VPS - 0.4V 25.5mm x 22mm x 4.2mm 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 IPDAN IPDFB LPDAN LPDFB OPDAN OPDFB CGS LPS OPS LIS CGLM LPLM OPLM LILM GND 2.5V LOOPGD IPWO LPWO OPWO LIO NC M1 M2 SDNG LDAN GND PGND PGND VPS 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Pin 1 25.5mm 20mm Figure 1 Bottom View of CWOA-A1-L1-D 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 (c) 2001 - 2003, Analog Technologies, Inc. All Rights Reserved. Analog Technologies, Inc. CWOA-A1-L1-D 4.2mm 0.42mm 18mm 3mm 0.6mm 1.27mm 4.2mm 3.2mm Figure 3 End View of CWOA-A1-L1-D 1 2 Figure 4 Side View of CWOA-A1-L1-D 3 GND D ILIM OPLIM LPLIM CGLIM LIS OPS LPS CGS OPFB OPA C LPFB LPA IPFB IPA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 GND ILIM OPLIM LPLIM GNLIM LIS OPS LPS GNS OPFB OPA LPFB LPA IPFB IPA VPS PGND PGND GND LDA 30 29 28 27 26 25 24 23 22 5 V (Input) 0 V (input) EDFA Components D1 IPA 2 1 2.5V GND LDA SDGN EDFA Input Photodiode M2 D2 M1 LPA 2 1 2.5V U1 CWOA-A1-L1-D SDGN M2 M1 NC OIO OPO LPO IPO LPGD 2.5V EDFA Laser Photodiode 21 20 19 18 17 16 OIO OPO LPO IPO LPGD 2.5V LDA 2 OPA 2 D3 1 2.5V EDFA Output Photodiode D4 1 GND EDFA Laser IPFB 2.5V LPFB LPA OPFB OPA OPO GNS 2.5V OPS LIS GNLIM LPILM OPLIM ILIM LPGD SDNG M2 M1 1 B 1 1 1 3 3 3 3 3 3 3 R1 10K 2 R2 10K 2 R3 10K 2 R8 300 1 2 2 2 W4 10K R7 499 2 W5 10K 2 W6 10K 2 W7 10K 2 W8 10K 2 W9 10K 2 W10 10K D5 LED S3 SW SPST S2 SW SPST S1 SW SPST 2 1 3 3 3 1 1 1 1 1 1 10K 10K 10K 1 1 2 R4 499 R5 499 R6 499 2 2 1 2 1 GND A Title 1 W1 W2 1 W3 2 Size B Date: File: 1 2 3 Number 14-Mar-2003 C:\My Documents\Electronic1\Backup of MFLD1 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 (c) 2001 - 2003, Analog Technologies, Inc. All Rights Reserved. |
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