Photodetector XPDV Ultrafast 1.55 m Photodetector XPDV Features: Highest bandwidth with flat response Excellent pulse behaviour Unsurpassed high-power handling capability High responsivity Unique on-chip integrated bias network Well matched to 50 Applications: 9 Communication systems at 40 Gbit/s (OC-768) and beyond 9 Microwave photonics up to 60 GHz 9 High-speed lightwave characterization www.u2t.de Photodetector XPDV Datasheet Specifications 3 dB bandwidth (GHz) XPDV 2020R min. typ. 50 >50 9 Pulse width (ps) Wavelength range (nm) 1480 DC responsivity (A/W) 0.55 Polarization dependent loss (dB) Dark current (nA) max. min. typ. 40 45 10 10 1620 0.7 1480 0.55 max. XPDV 2040R min. typ. 40 45 10 12 1620 0.7 max. min. 12 1480 0.6 XPDV 1020R 1620 max. notes 50 >50 1) 9 10 1) 1480 0.4 0.7 typ. 1620 0.5 1) 0.5 0.8 0.5 0.8 0.6 1.0 0.7 1.1 5 50 5 50 5 50 5 50 1) 20 1), 2), 3) Optical input power (mW mean) 20 20 Optical return loss (dB) 28 24 S22 (0.05 - 50 GHz) (dB) -13 -8 notes XPDV 2020 28 20 24 -12 1) 28 28 24 1) -8 -13 -8 1) 1) = 1550 nm, Vbias = 2 V, T = 25 oC 2) measured using a pulse source (1 ps pulse width) and a Tektronix CSA 8000 oscilloscope with an 80E01 sampling head 3) change in pulse width is less than 10 % Product Description Key element of the u2t XPDV photodetector modules are our well-established waveguide-integrated photodiodes. They are designed to exhibit an optimized frequency response in both, power and phase. Due to our sophisticated rf-packaging, the pulse response reveals almost no ringing. The measured pulse width is limited by todays fastest available sampling scopes. Our integrated on-chip spot size converter leads to a high responsivity and ensures reliability and robustness of the XPDV. A further advantage of the waveguide structure is the unsurpassed high power behaviour. A linear response up to an optical input power of 13 dBm is a unique feature of the XPDV photodetector modules. For short pulses an output voltage swing of more than 1 Vpp can be achieved, without any degradation of the pulse response. All u2t's XPDV contain our unique on-chip integrated bias network. It ensures an Response (dB) 0 -3 -6 -9 0 40 20 10 30 Frequency (GHz) Typical calibrated frequency response of an XPDV 2020R undisturbed frequency response from DC to the 3 dB cut-off frequency and saves costs for external bias-tees. 50 1) Product Selection Guide 0.20 please send an email to sales@u2t.de. XPDV 2020R The XPDV 2020R is the ultimate photodetector in terms of speed, responsivity and 0.15 low polarization dependent loss (PDL). The 3 dB electrical bandwidth exceeds 50 GHz, typical values are 60 GHz and beyond. The integrated 50 termination permits the matching to your system with minimum ripple in the frequency domain. XPDV 2020 The XPDV 2020 is a device without internal termination. The typical applications are systems or measurements, where the rf-responsivity is more important (6 dB more output power) than a flat frequency response. XPDV 2040R This internally terminated photodetector is the obvious choice for applications which do not require the ultimate bandwidth of an XPDV 2020R. It has a very defined RC-limited cut-off frequency of typically 45 GHz and a guaranteed responsivity of more than 0.6 A/W . XPDV 1020R The XPDV 1020R is the economy version of the XPDV 2020R with the same ultimate frequency response, but some relaxed specifications in terms of responsivity and PDL. Response (V) This brief description of the available XPDV photodetector devices should help you to identify which device suits your application best. If you need more information, 0.10 0.05 0.00 0 50 100 150 Time (ps) Typical uncalibrated pulse response of an XPDV 2020R Measurement set-up: 1) Agilent lightwave component analyzer 2) Pulse source (1 ps pulse width) and a Tektronix CSA 8000 oscilloscope with an 80E01 sampling head 200 2) Absolute Maximum Ratings Reverse bias voltage (V) Mechanical Dimensions 3 Forward current (mA) 5 Maximum optical power (mW mean) 50 Maximum peak-peak voltage (V) 1.5 Operation temperature (C) -20 ... +85 Storage temperature (C) -20 ... +85 Humidity 58.8 22.0 Pin-out 2.0 3.5 11.0 17.0 0-90 % non condensing 6.7 rf out optical connector V bias 4.5 4.6 *) gnd All dimensions in mm. * ) optional 50 matching resistor Ordering Information Please use the following table to select your required configuration of the photodetector. XPDV xxxxR - yy - zz specifies optical connector FP = FC/PC FA = FC/APC SP = SC/PC SA = SC/APC other connectors available upon request specifies rf connector VF = female V-connector (standard) VM = male V-connector product specification (see product selection guide) available types: 2020R, 2020, 2040R, 1020R the R specifies internal 50 termination Example: XPDV 2020R - VF - FP Photodetector Power Supply PPS All photodetectors are delivered with an easy-to-use battery powered bias-supply. For optimum performance, in particular at high optical input levels, we recommend the use of our separetely available PPS power supply. For More Information Please contact our sales department at ++49 30 726 113 530 or sales@u2t.de www.u2t.de u2t Photonics AG Reuchlinstrasse 10-11 10553 Berlin GERMANY phone: fax: e-mail: http:// ++49 30 726 113 500 ++49 30 726 113 800 contact@u2t.de www.u2t.de Applications Optimized Response: Frequency and Time Domain 0.3 Response (V) Response (dB) 0 -3 bandwidth > 50 GHz -6 FWHM typ. 9 ps 0.2 0.1 0.0 -9 50 100 50 150 20 30 0 200 40 Frequency (GHz) Time (ps) 40 Gbit/s long haul systems require photodetectors with a clean response in power as well as in phase. u2t's waveguide-fed photodiodes are intrinsically fast devices and do not require any rf-enhancement in the package e.g. by inductive peaking. Hence, 0 10 there is absolutely no trade-off between frequency and time domain performance. This fact, together with the high responsivity makes them best suited for 40 Gbit/s systems and all other high-performance, high-frequency systems. Response (V) 0.8 0.6 FWHM < 10 ps 0.4 0.2 0.0 100 DC photo current (mA) = 1.55 m R = 0.7 A/W input power 1.0 = 1.55 m frf = 50 GHz 20 10 0 1 -20 0.1 -40 RF output power (dBm) High-Power Behaviour: Pulse Response and Power Linearity 0.01 50 0 100 Time (ps) 150 200 -10 10 0 -5 5 Mean optical power (dBm) 15 The performance of optically amplified systems is optimized by photodetectors, that can handle extremely high optical powers. Due to the distributed absorption process, u2t's photodetectors smoothly manage peak output voltages up to 1 V and an optical input power of +13 dBm and are therefore capable of directly driving digital decision circuits. System Performance: RZ and NRZ Eye Diagram 40 Gbit/s NRZ 10 mV/div 62.5 mV/div 40 Gbit/s RZ 10 ps/div 10 ps/div measured by SHF Communication Technologies AG, Germany The excellent performance of u2t photodetectors was proven in a variety of our customers systems. This includes 40 Gbit/s RZ- and NRZ-systems with and without FEC as well as reference set-ups. Our devices excel even in some experimental systems STUDIOPROKOPY, Berlin at 80 Gbit/s. Copyright (c)2002 u2t Photonics AG. All rights reserved. u2t reserves the right to make changes without notice. Any Trademarks used in this document are properties of their respective owners. DB.XPDV20xxx.30.0202