Product Bulletin. Temperature Tunable 10 mw WDM Laser for Direct Modulation in Links up to 180 km CQF413/608 Series

Transcription

1 Product Bulletin 13/ Temperature Tunable 10 mw WDM Laser for Direct Modulation in Links up to 180 km CQF413/608 Series The CQF413/608 is a 2 channel tunable (100 GHz ITU grid) directly modulated laser source for use in metro WDM systems up to a bit rate of 2.5 Gb/s and 180 km link length. The peak output power is 10 mw. Wavelengths are available in the range from to nm(c and L bands) in accordance with the ITU recommendation. Adhering to the 100 GHz grid each laser can be adjusted between 2 adjacent channels (3 channels adhering to the 50 GHz grid) by temperature tuning. The laser is available in a standard 14-pin butterfly package with a single-mode fiber. It has excellent thermal stability (e.g., wavelength drift with case temperature is much better than 1 pm/ C). Dependence of the optical isolation on case temperature is minimized by a cooled isolator. The internal bias-t network and built-in monitor diode enable simple DC-bias conditioning and output power stabilization of the laser diode. Under small signal modulation conditions, the bandwidth of the device exceeds 3 GHz. Due to the intrinsic low chirp characteristic of the DFB laser, the device is especially suitable for digital transmission at 1550 nm. Based on standard single-mode fiber with non-zero dispersion, the maximum dispersion penalty at BER = is less than 2 db for a total dispersion of up to 3240 ps/nm at 1550 nm. Wavelength drift tests have been performed to warrant long term wavelength stability. Key Features 1550 nm (WDM) DFB laser diode Temperature tunable over 2 x 100 GHz channels 2.5 Gb/s suitable for OC-48 / STM-16 Built-in cooled optical isolator Wavelengths available from nm (C and L bands) 25 W electrical impedance matching 180 km distance (3240 ps/nm dispersion at 1550 nm) Applications WDM metro architectures and cable television (CATV) networks, where high optical output power and very low dispersion are required. Especially suitable for systems operating in environments with uncontrolled ambient temperature. 100 GHz ITU grid system design without increasing the complexity of inventory compared to 200 GHz system architectures.

2 CQF413/608 Series 2 Specifications Limiting Values Parameter Symbol Conditions Min Max Unit Laser diode Radiant output power from pigtail P peak see note 1-15 mw Reverse voltage V R V Forward current I F ma Monitor diode Reverse voltage V R V Forward current I F ma Module Storage temperature range T stg C Operating temperature range T op cooler active C Fiber pigtail Bending radius R mm Tensile strength fiber to case F N Characteristics (T chip = T l, T amb at 25 C, P avg = 7 dbm unless otherwise specified) Parameter Symbol Conditions Min Typ Max Unit Radiant output power from pigtail P peak see note mw Operating current I op ma Differential efficiency h mw/ma Laser diode Threshold current I th ma Forward voltage V F V Central wavelength (ITU grid) l c nm Laser set temperature for l c T l C Wavelength drift with case temperature TE l 20 C < T l < 40 C pm/ C Side mode suppression ratio SMSR db Dispersion penalty at BER = DP NRZ, PRBS = , db 3240 ps/nm at 1550 nm with ER > 9 db Optical isolation ISO db RF Characteristics Bandwidth (-3 db) S GHz Return loss S 11 from 3 MHz to 2 GHz db from 2 GHz to 3 GHz db Monitor Diode (V R = 10 V) Monitor diode responsivity R ma/mw Dark current I md ma Temperature tracking error TE 0 C < T case < 85 C % Thermistor Resistance R th T th = 25 C kw Thermistor constant B K Thermo-Electric Cooler Cooler current I cool at DT = 45 C A at DT = 65 C A Cooler voltage V cool at DT = 45 C V at DT = 65 C V Reliability Long term l-drift, see note 2 ML EOL: Dl = 0.1 nm years Notes 1. Under modulation: P avg» P peak / 2 (mw) or P avg» P peak - 3 dbm (dbm). 2. Mechanical integrity/environmental endurance tested according to Telcordia GR-468-CORE and MIL-STD-883 ML = Median Life, EOL = End Of Life.

3 CQF413/608 Series 3 Typical Performance Characteristics 10-3 BER 10-4 DC & TEC control Digital scope 10-5 CQF413 Pattern Generator switch 80km traject EDFA λ -filter 100km traject 10% 90% coupler BER tester Receiver Attenuator dbm Each CQF413 laser is separately tested for dispersion penalty using a set-up with the required fiber length of 180 km (3240 ps/nm at 1550 nm). Typical bit error rate measurement and eye-diagram for one channel of the CQF413 (2.5 Gb/s, NRZ, ER > 9 db, PRBS: n = 23, 3240 ps/nm at 1550 nm). Dispersion penalty is less than 2 db at BER = Relative intensity [db] Signal [db] S 21 S Wavelength [nm] The optical spectrum measured at average output power for the CQF f [GHz] Typical RF behavior measured at average output power for CQF413. S 11 denotes the RF electrical reflection coefficient at the 25 W input measured with a 50 W test set. S 21 is the small signal electrical-to-optical transfer coefficient.

4 CQF413/608 Series 4 Specifications Continued Characteristics Parameter Symbol Min Typ Max Unit Single Mode Fiber Pigtail Mode field diameter Ø mf mm Cladding diameter Ø cl mm Eccentricity of core e mm Outer diameter of tight buffer Ø sc mm Length of pigtail m Mechanical Dimensions Pin-Out 1 thermistor 2 thermistor 3 LD cathode DC input via inductance 4 PD anode 5 PD cathode 6 cooler anode 7 cooler cathode 8 case GND 9 case GND 10 not connected 11 LD anode, case 12 LD cathode, AC input 13 LD anode, case 14 not connected

5 CQF413/608 Series 5 Ordering Information Indicate your requirements by selecting one option from the configuration table. The channel ordered is the highest optical frequency of the 2 x 100 GHz channels. Please print the corresponding code in the available boxes to form your part number. For more information on this or other products and their availability, please contact your local JDS Uniphase account manager, call toll free in North America, or via at jdsu.sales@us.jdsuniphase.com. For contact information in Europe and Asia, please visit our Web site at or call toll-free. Sample: CQF413/ for optical frequencies THz and THz. Attention: Order confirmations on this part number will be preceeded by FG (e.g., FG CQF413/ ). CQF413/ Telcordia is a trademark of Telcordia Technologies Incorporated Fiber Termination Default 1.25 mm or 2.5 mm ferrule FC/PC or SC/PC connectors optional North America toll-free: Worldwide toll-free: For our locations around the globe, visit: All statements, technical information and recommendations related to the products herein are based upon information believed to be reliable or accurate. However, the accuracy or completeness thereof is not guaranteed, and no responsibility is assumed for any inaccuracies. The user assumes all risks and liability whatsoever in connection with the use of a product or its application. JDS Uniphase reserves the right to change at any time without notice the design, specifications, function, fit or form of its products described herein, including withdrawal at any time of a product offered for sale herein. JDS Uniphase makes no representations that the products herein are free from any intellectual property claims of others. Please contact JDS Uniphase for more information. JDS Uniphase and the JDS Uniphase logo are trademarks of JDS Uniphase Corporation. Other trademarks are the property of their respective holders. Copyright JDS Uniphase Corporation. All rights reserved. RWR WWM, Rev.02 01/2002