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1241CBU Datasheet(PDF) 6 Page - Agere Systems |
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1241CBU Datasheet(HTML) 6 Page - Agere Systems |
6 / 12 page 6 6 Agere Systems Inc. Data Sheet September 1999 1241/1243/1245-Type Uncooled Laser Transmitter Characteristics (continued) Table 3. Optical Characteristics 1. Output power definitions and measurement per ITU-T Recommendation G.957 and G.958. 2. Ratio of logic 1 to logic 0 power levels. 3. Between 10% and 90% (50% duty cycle). 4. Root-mean-square spectral width accounts for modes up to and including those 20 dB down from the central mode. (Applies to 1241-Type only.) 5. Applies to 1243/1245-Type only. Recommended User Interfaces 1-496(C).c * Locate these components as close to DATA/DATA inputs as possible. Note: The 1241 gigabit version does not require the external 50 Ω terminations since this termination is included inside the module. Figure 2. dc-Coupled, Differential Input Parameter Symbol Min Typ Max Unit Average Power Output Options1 PO See Ordering Information. dBm Extinction Ratio2 rE 10 — — dB Optical Rise and Fall Times3: OC-3/STM-1 OC-12/STM4 1062.5 Mbits/s tR, tF tR, tF tR, tF — — — — — — 1.0 0.5 0.37 ns ns ns Center Wavelength λ See Ordering Information. nm RMS Spectral Width4 ∆λ —— 4 nm Side-mode Suppression Ratio5 SMSR 30 — — dB ECL DRIVER D TRANSMITTER 15 16 50 •* 360 • 360 • VEE D VEE 50 •* 0.1 µF 50 • MICROSTRIP OR STRIPLINE- CONTROLLED IMPEDANCE TRACES |
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