LC25EW4532CAJ34

Data Sheet 2.5Gb/s Buried Het Laser 175km Reach With Optional Etalon Stabilization LC25W-A (175km) This laser module employs the Bookham strained layer MQW Buried Heterostructure DFB laser chip, and has been designed specifically for use in Wavelength Division Multiplexed (WDM) 2.5Gb/s long distance optical fiber trunk systems. The device is packaged in a hermetically sealed 14-pin butterfly package incorporating an isolator and monitor photodiode for control of the power of the laser over life and all operating conditions. The device is available with a number of power options depending on application and link span requirements. The optional internal Etalon wavelength stabilization and low chirp performance makes this product compliant with 50GHz optical channel spacing. Features: • 2.5Gb/s operation • +/-95pm wavelength stability over life without Etalon locker • Optional Etalon wavelength stabilization provides 50GHz optical channel spacing compliance for interlay or future upgrade • Narrow spectral line-width • Internal TEC with precision NTC thermistor for temperature control • Entire C & L-band ITU wavelengths available (1527nm to 1605nm) • Code reduction with single product for reaches up to 175km • GaInAsP SLMQW DFB single frequency laser chip • InGaAs monitor photo-diode • Hermetically sealed 14-pin butterfly package with optical isolator • RoHS compliant Applications: • WDM • On-off ramps • Long-Haul • DWDM on ITU Grid 1 Data Sheet Parameters Parameter Threshold current (Ith) Slope efficiency by product 2 mW 3 mW 4 mW 10 mW [1] Conditions Min Typ 10 Max 22 0.09 0.13 0.17 0.43 -10 Unit mA mW/mA 0.04 0.06 0.08 0.143 RF input reflection coef (S11) Forward voltage Peak wavelength (λp) Dispersion penalty at 175 km Time averaged spectral linewidth Side-mode suppression Optical rise/fall time Monitor photo current Monitor dark current Thermistor resistance Heatpump current Heatpump voltage Change of λp with laser temp. Change in λ over life and operating conditions Optical Spectral Window dB V nm dB nm dB 1.3 [2] [3] 1.8 1605 2 1527 -20 dB 32 [4] 0.1 40 0.6 125 50 40 250 250 1200 360 100 10 ps µA nA k Unlocked Etalon locked 70°C case temperature 70°C case temperature 15°C to 35°C Unlocked [5] 250 600 1.0 0.09 900 2.4 mA V nm/°C -45 -9 +145 +9 pm GHz Locked, over life & temperature including chirp [5] [1] 50 measurement system, f = dc - 3GHz. [2] Submount temperature between 20°C to 35°C start of life to achieve required λp. For the 10mW version, submount temperature is between 15°C to 35°C start of life. [3] Standard product dispersion penalty will be compliant to the specified link length of 175km using an extinction ratio of 10dB. Fiber dispersion characteristics are derived from the following equation. Where So = 0.092ps/(nm2.km) and λ= 1302nm. [4] Measurements determined from 20 - 80% pk - pk. [5] For more information on wavelength control and drift over life refer to applications note DR1670. To give symmetrical wavelength performance about the ITU channel wavelength (+/-95pm) offset the laser wavelength by –50pm at start of life set up. So D ( )= ( 4 4 0 3 ) ps /(nm.km) 2 Data Sheet Absolute Maximum Ratings Parameter Case operating temperature Laser submount operating temperature Storage temperature Laser current above Ith Laser reverse voltage Laser reverse current Monitor diode bias Heatpump voltage Fiber bend radius Notes: [1] Product without locker can be tuned onto the next 100GHz ITU channel in the red shift direction (2x100GHz tunability) by increasing the submount temperature to a maximum of 43°C. [2] For the 10mW version, the minimum laser submount operating temperature is 15°C. [1] [2] Min 0 20 -40 Max 70 35 85 100 1.0 10 -10 2.4 30 Unit °C °C °C mA V µA V V mm Reliability/Quality Meets qualification requirements of Telcordia / Bellcore GR468-Core for central office environment. Operating reliability 1510nm CLASS IIIb LASER PRODUCT 6 THIS PRODUCT COMPLIES WITH 21 CFR 1040.10 ISO14001:1996 EMS 504193 TL9000 Rev 3.0 (ISO9001:2000) FM15040 Caution - use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. BH13088 Rev 1.0 January 2007. ©Bookham 2006. Bookham is a registered trademark of Bookham Inc.