10021971

COMMUNICATIONS COMPONENTS 2.5 Gb/s Bias-Free Modulator with Integral Attenuator Key Features • Bias-free operation for fast transmitter development and manufacturing • Built-in 20 dB variable optical attenuator • Single package for less splicing, lower overall insertion loss and more usable board space • 1535 to 1565 nm operation; L-band versions available • Low drive voltage; compatible with commercial drivers • Low chirp for maximum transmission distance (>1000 km) • Voltage-controlled lithium niobate attenuator provides proven high reliability Applications • Medium- and long-haul DWDM transmission requiring dynamic optical power leveling • Transmitters with limite component space The 2.5 Gb/s bias-free modulator with integral attenuator combines a modulator and a 20 dB variable attenuator within one small-outline package, simplifying component count and fiber splicing. The bias point of the interferometer is set to operate at about the half-intensity point (quadrature). A bias control circuit is not required. The attenuator is based on proven integrated optical waveguide technology, making it highly reliable. The modulator provides superior signal quality over a wide range of wavelengths in the C and L bands, and can be used to modulate tunable lasers. These devices are used for 2.5 Gb/s modulation and dynamic power leveling in dense wavelength division multiplexing (DWDM) systems. NORTH AMERICA : 800 498-JDSU (5378) WORLDWIDE : +800 5378-JDSU WEBSITE : www.jdsu.com 2.5 GB/S BIAS-FREE MODULATOR WITH INTEGRAL ATTENUATOR 2 Typical Performance Characteristics Typical Frequency Response Curve, S21 0.00 0 Typical Return Loss Curve, S11 -2.50 -2 -4 -6 -8 -5.00 -7.50 S21 (dB) S11 (dB) -10.00 -12.50 -15.00 -10 -12 0.0 0.5 1.0 1.5 2.0 2.5 3.0 -17.50 -20.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) Dimensions Diagram (Specifications in inches [mm] unless otherwise noted.) 7.9 [200] MINIMUM BARE FIBER 39.4±2.0 [1000±50] .287 [7.30] 3.047 [77.39] .157 [3.99] (2) PLCS (2) PLCS .09 [2.2] DATE IN ATTENUATOR DC BIAS INPUT MZ1 INPUT 0 VDC MAX +24 dbm MAX MZ2 INPUT MODEL NUMBER OUT S/N XXXX .200[5.08] (6) PLCS PIN DIA .020 (2) PLCS PIN DIA .012 .77 [19.7] (2) PLCS 5.2±.2 [131.4±5.1] PIN DIA .020 (2) PLCS 39.4±2.0 [1000±50] 7.9 [200] MINIMUM BARE FIBER TOP VIEW PIN DIA .012 .30 [7.6] .15 [3.7] .149 [3.78] (2) PLCS .143 [3.63] BOTTOM OF PINS (6) PLCS 10020289"X" "X" DENOTES REV LETTER .433 [11.00] .19 [4.9] .30 [7.6] .500 [12.70] (2) PLCS .060 [1.52] .655 [16.64] .855 [21.72] 1.947 [49.44] 2.047 [51.98] 2.147 [54.52] 2.300 [58.42] 3.622 [92.01] .15 [3.7] LEFT SIDE VIEW RIGHT SIDE VIEW FRONT VIEW 2.5 GB/S BIAS-FREE MODULATOR WITH INTEGRAL ATTENUATOR 3 Specifications Parameter General Material Crystal orientation Waveguide process Optical Operating wavelength Insertion loss, no connectors (note2) On/off extinction ratio, low frequency Optical return loss Electrical RF port Drive voltage, V peak-to-peak, at 2.5 Gb/s PRBS (note3) Vπ at 100 kHz (note3) S21 electro-optic bandwidth (-3 dBe) (note1, 3) S11 return loss 0.03 to 2.5 GHz (note3) RF input power Chirp, alpha parameter Attenuator port Vπ at DC Impedance Mechanical Input Output (note4) RF connection Bias connection Environmental Operating temperature Storage temperature 1. Relative to 30 MHz. Specification Lithium niobate x-cut, y-propagating APE/titanium-indiffused 1535 to 1565 nm ≤6.5 dB ≥20 dB ≥50 dB 3.6 V typical ≤3.7 V ≥2.5 GHz ≤-9.5 dB ≤24 dBm |α|