LC25TCBJ28

Data Sheet 2.5 Gb/s Buried Het 4x100GHz Tunable Laser with extended reach option LC25T This laser module employs the Bookham gain coupled SLMQW buried heterostructure DFB laser chip, and has been designed specifically for use in Wavelength Division Multiplexed (WDM) 2.5 Gb/s long distance optical fibre 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 module is tunable by means of the internal thermo-electric cooler over four adjacent 100 GHz ITU WDM channels with a case temperature of 70°C, or over two adjacent 100 GHZ channels with a case temperature of 85°C The device is available with a number of power options and wavelength schemes, which are customizable to individual customer specification. Features: • 2.5 Gb/s Operation • Tunable over four separate channels at 100 GHz channel spacing • +/-95pm wavelength stability over life • Entire C band ITU wavelengths available (1528 to 1563 nm) • Narrow spectral line-width • Hermetically sealed 14-pin butterfly package with optical isolator • Internal TEC with precision NTC thermistor • Extended reach performance up to 360 km with low dispersion penalty • RoHS compliant Applications: • Cost effective metropolitan or long haul networks • Stock inventory / Spares reduction • Network protection • Low-speed routing / Networks reconfiguration 1 Data Sheet Parameters Parameter Threshold current (Ith) Slope efficiency 2 mW 3 mW 4 mW High Power [1] [2] 1.3 [3] [4] -20 dB 34 [5] 50 250 0.4 40 125 1200 100 ∆T = 64°C 8 to 50°C [6] -45 4.07 20.7 1000 2.4 0.09 +145 1527 0.04 0.06 0.08 0.143 Conditions Min Typ 10 Max 22 0.09 0.13 0.17 0.43 -10 1.8 1563 2 0.6 Unit mA mW/mA mW/mA mW/mA mW/mA dB V nm dB nm dB ps µA nA k mA V nm/°C pm RF input reflection coef (S11) Forward voltage Peak wavelength (λp) Dispersion penalty 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 λ with laser temp. ∆T = 64°C Change of λ over life and operating conditions [1] The high power version provides 10 mW peak output power for 175 km applications and 7 mW peak ouput power for 360 km applications. [2] 50 measurement system, f = dc - 3 GHz. [3] Submount temperature between 8°C & 50°C start of life to achieve required λp. [4] Dispersion penalty is compliant to a link length of 175 km or 360 km using an extinction ratio of 10dB. Fibre dispersion characteristics are derived from the following equation: 4 0 3 D(λ ) = where So =0.092 ps/(nm2 km) and λ0 = 1302 nm. [5] Measurements determined from 20 - 80% Pk - Pk [6] For more information on wavelength control and drift over life refer to application 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 λ (λ − ) ps /(nm.km) 4 λ 2 Data Sheet Absolute Maximum Ratings Parameter Case operating temperature (with 2 x 100 GHz tuning) Case operating temperature (with 4 x 100 GHz tuning) Laser submount operating temperature Storage temperature Laser current above Ith Laser reverse voltage Laser reverse current Monitor diode bias Heat Pump Current Heatpump voltage Fibre bend radius 30 Min -20 -20 8 -40 Max 85 70 50 85 100 1.0 10 -10 1 2.4 Unit °C °C °C °C mA V µA V A V mm Reliability/Quality Meets Qualification requirements of Telcordia / Bellcore GR468-Core for central office environment. Operating reliability 1510nm CLASS IIIb LASER PRODUCT 8 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. BH13089 Rev 1.0 January 2007. ©Bookham 2006. Bookham is a registered trademark of Bookham Inc.