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LC151B Scheda tecnica(PDF) 3 Page - Bookham, Inc. |
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LC151B Scheda tecnica(HTML) 3 Page - Bookham, Inc. |
3 / 4 page Data Sheet 3 Tolerances ± 0.25 mm Finish: Gold plate Pin 1 and Pin 2 Thermistor The thermistor is used in a control loop in conjunction with the thermo-electric cooler to maintain the laser submount temperature at the required value. Operating current should be less than 100 µA to prevent selfheating errors. Pin 3 Laser modulation (-) and bias The data input (modulation) and bias are both applied via this pin which has a nominal 25 Ohm load impedance. Pin 4 Monitor anode, Pin 5 Monitor cathode The back facet monitor diode provides a mean power reference for the laser and is normally operated with a 5 V reverse bias. Pin 6 TEC (+), Pin 7 TEC (-) Applying a positive voltage on pin 6 with respect to pin 7 will cause the internal submount to be cooled relative to the case temperature. Reversing the polarity will raise the submount temperature relative to the case. Care should be taken to avoid overheating the submount when driving the TEC in this manner. The TEC supply should be capable of delivering up to 1.2 A at 2.5 V. Pin 8, 9, 11, 13 Case ground. These pins must be grounded in all applications. Pin 10, 14 N/C These pins are not connected. They should be grounded if possible. Pin 12 Laser (+) This pin provides the return path for the laser modulation and bias circuits. Package Outline Drawing and Dimensions Instructions for Use Figure 3: Dimensions diagram. |
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Descrizione simile - LC151B |
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