N7782B

Agilent N7782B PER Analyzer and N7783B Thermal Cycling Unit Data Sheet Key Benefits • • • • • • • • Accurate PER-measurement up to 50 dB Real-time display Easy-to-use: Reliable results independent of operator skill set Swept-wavelength and heating/stretching method available Measurement of the PER versus wavelength Fast/slow axis detection Instruments available for 850 nm up to 1640 nm Internal fixed wavelength sources at 850 nm/1310 nm/1550 nm available. Introduction Agilent’s N7782B Series of polarization extinction ratio (PER) Analyzers has been designed for high speed and highly accurate testing of PER in PM fibers. The polarimetric measurement principle guarantees reliable measurements of PER values of up to 50 dB. The real time measurement capability in combination with automation interfaces makes this unit ideally suited for integration in manufacturing systems, for example pig-tailing stations for laser diodes and planar wave guide components. Analog interfaces are provided for integration of the system in control loop applications. Applications Laser diode PMF pig-tailing Alignment of the PM fiber during the pig-tailing process is supported by real-time display of the PER and the optical power. Characterization of PMF cross-coupling Polarization crosstalk in a PM fiber is measured and displayed as PER. PM splice characterization PMF splicing In order to support the alignment during the splicing process of PM fibers the Agilent N7782B provides real time display of the optical power and of the angular misalignment of the two fibers. The angular misalignment of a PM splice can be measured in a non-destructive way. Even multiple splices in a chain can be characterized independently. Using Agilent’s tunable laser source 81600B Series in combination with the N7782B PER analyzer allows measuring the PER as a function of wavelength. Agilent’s software package includes drivers for most of the tunable laser sources commonly used in industry. PM component characterization Measurement of the PER on PM components like fiber polarizers, PMF couplers, PMF splitters, etc. N7782B and N7783B Application Examples N7783B α N7782B Thermal cycling unit Laser diode PMF PER analyzer Figure 1. Laser diode pigtailing using the combination of N7782B and N7783B. Control The heating / stretching method The heating / stretching method provides accurate measurements of the PER at a single wavelength. This method supports in particular well the measurement using narrow-band laser sources. An optional internal laser source allows stand-alone operation of the system. Agilent’s thermal cycling unit, N7783B, is fully controlled by the N7782B PER analyzer and allows accurate and repeatable cycling of the temperature of the fiber under test. The PER measurement system consisting of the N7782B and the N7783B shows excellent accuracy and repeatability. Ease of use and automation interfaces, such as analog output ports for active alignment, make it particularly useful for production environments. Ref. PER = 15.33 dB P = 7.23 dBm Figure 2. Live PER = 31.68 dB 2 Agilent N7782B PER Analyzer and N7783B Thermal Cycling Unit Data Sheet Splice angle characterization For characterizing an optical connection between two polarization maintaining fibers (PMFs), such as an optical splice, two thermal cycling units (N7783B) can be used. This eliminates the influence of input polarization or subsequent fibers at the output and isolates the angular misalignment of the connection located between the two thermal cycling units. Figure 3. Table 1: Specificationsa) N7782B PER Analyzer Wavelength Specification Wavelength Range 1270 nm … 1375 nm (Opt 300, O-Band) 1270 nm … 1375 nm, 1460 nm … 1620 nm (Opt 400, O/C/L-Band) 1460 nm … 1620 nm (Opt 500, C/L-Band) 1260 nm ... 1640 nm 0 … 50 dB [c,d] Operating wavelength rangeb) PER Analysis PER Range[c,d] PER Uncertainty, Single-TCU Method Splice Angle Analysis Splice Angle Uncertainty, Dual-TCU Method[c,d] (typical) Optical Power Input Power Range Internal Laser Source Wavelength Output Power[e] (typical) (typical) PER= 0 dB ... 30 dB: PER= 30 dB … 50 dB: ±(0.1° + 4% - Angle) 0.30 dB 0.60 dB -50 dBm ... +7 dBm O-Band (Opt. 401): C-Band (Opt. 501, 401): O-Band (Opt. 401): C-Band (Opt. 501, 401): 1290 nm … 1360 nm, 1310 nm typ. 1510 nm … 1580 nm, 1550 nm typ. -12 dBm -10 dBm [a] [b] [c] [d] [e] Ambient temperature change max. ± 0.5°C since normalization. Specification valid on day of calibration. PER measurements are possible outside the specification wavelength range if the user performs a manual calibration. Note that a fully polarized light source is needed for calibration. Input power > -30 dBm Narrow-band light source with DOP > 95% needed. At room temperature. Agilent N7782B PER Analyzer and N7783B Thermal Cycling Unit Data Sheet 3 Table 2: Specificationsa) N7782B-101 PER Analyzer Wavelength Specification Wavelength[e] Operating Wavelength Range PER Analysis PER Range[c,d] PER Uncertainty, Single-TCU Method[c,d] (typical) Splice Angle Analysis Splice Angle Uncertainty, Dual-TCU Method[c,d] (typical) Optical Power Input Power Range Internal Laser Source Wavelength Output Power [a] [b] [c] [d] [e] [f] [f] 2) 850 nm nominal 830 nm ... 1000 nm 0 ... 40 dB PER= 0 dB ... 30 dB: PER= 30 dB … 40 dB: ±(0.1° + 5% Angle) 0.30 dB 0.60 dB -35 dBm ... +10 dBm 830 nm ... 880 nm, 850 nm typ. (typical) - 11 dBm Ambient temperature change max. ± 0.5°C since normalization. Specification valid on day of calibration. PER measurements are possible outside the specification wavelength range if the user performs a manual calibration Note that a fully polarized light source is needed for calibration. Input power > -20 dBm Narrow-band light source with DOP > 95% needed. The specification wavelength matches the wavelength of the internal laser source. At room temperature. Table 3: Specificationsa) N7783B Thermal Cycling Unit Temperature Minimum Peak-to-Peak Temperature Tuning Range[b] Ambient Temperature Range [a] [b] 50 K 20°C ... 30°C Ambient temperature change max. ± 0.5°C since normalization. Specification valid on day of calibration. Measured on the surface of the TEC elements. 4 Agilent N7782B PER Analyzer and N7783B Thermal Cycling Unit Data Sheet Agilent N7782B PER Analyzer and N7783B Thermal Cycling Unit Data Sheet 5 www.agilent.com Remove all doubt Our repair and calibration services will get your equipment back to you, performing like new, when promised. You will get full value out of your Agilent equipment throughout its lifetime. Your equipment will be serviced by Agilent-trained technicians using the latest factory calibration procedures, automated repair diagnostics and genuine parts. You will always have the utmost confidence in your measurements. Agilent offers a wide range of additional expert test and measurement services for your equipment, including initial start-up assistance onsite education and training, as well as design, system integration, and project management. 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