Optical Amplifier Analyzer AQ8423Z Dual Band Optical Amplifier Analyzer Switchable C-band and L-band Dual Band Optical Amplifier Analyzer Switchable C-band and L-band The AQ8423Z is a unique dual-range optical amplifier analyzer. In conjunction with an external optical spectrum analyzer （OSA） and light sources （such as tunable laser sources or DFBs）, the AQ8423Z can measure gain and noise figure （NF） of optical amplifiers both in C-band and L-band. Two testing wavelength ranges can be switched internally by simple operation. The AQ8423Z employs the proven "Pulse method" technique. It utilizes 1 MHz modulation frequency, which is high enough to suppress a rise of ASE （amplified spontaneous emission） level during off signal. The AQ8423Z can achieve very high accuracy in ASE measurement resulting in accurate NF measurement. Since the AQ8423Z can eliminate all DWDM signals simultaneously during ASE measurement, it can obtain measurement results under actual DWDM operational conditions. Features Pulse method with 1 MHz modulation High enough frequency to suppress a rise of ASE during a measurement C- and L-band measurement capability Measurement range is switchable, either to C-band （1520-1580 nm） or L-band （1560-1620 nm） DWDM measurement mode A DWDM amplifier, with multi-tone signals, can be measured under its actual operational conditions. Hands-free calibration New hands-free calibration function, added to full user calibration feature, makes daily calibration simple and quick. Maximum test channel: 200 channels Minimum channel spacing: 25 GHz In conjunction with AQ6317 ANDO optical spectrum analyzer AOM1 OC OSW AOM2 ATTN OSW ISO OPM EXT IN REF IN MON OUT IN OSA AQ4321D Tunable Laser Source （1520-1620 nm） AQ6317B Optical Spectrum Analyzer （600-1750 nm） ATTN: Optical Attenuator AOM1,2: Acousto Optic Modulator ISO: Isolator OC: Optical Coupler OSW: Optical Switch OPM: Reference Optical Power Meter Signal and ASE detection timing Example of measurement system configuration Test data example Test results displayed on AQ8423Z DFB-LD characteristic on AQ6317B’s display Notes . Optical spectrum analyzer has to be ANDO product （AQ6317B is recommended）. . Optical spectrum analyzer is fully controlled by AQ8423Z via GP-IB during a measurement. . A bunch of DFB-LDs and tunable laser source can be used as an external light source. Tunable laser source from different manufacturers can be controlled via GP-IB by AQ8423Z. * Left picture shows a system configuration example by AQ8423Z, AQ6317B and 18-channel DFB-LD. 1. Signal Power AOM1 AOM2 2. ASE Power AOM1 AOM2 Effect of AOMs on optical spectrum EDFA Output AQ8423Z Output for ASE Meas. WDM Signals + ASE ASE The AQ8423Z modulates signals from external light sources with AOM1, and AOM2 selects the timing to measure, signal or ASE （Amplified spontaneous emission）. When AOM2 is set for ASE measurement, AOM2 eliminates the source signal and SSE （Source spontaneous emission） without affecting the ASE level （to increase input power, a booster amplifier can be added to external light sources, the SSE includes ASE of the booster amplifier in this case）. Thus, the AQ8423Z can measure the ASE at a signal wavelength very accuray. The modulation frequency is also very important. It strongly affects ASE measurement accuracy, which results in an error on NF. In order to minimize ASE measurement errors, the AQ8423Z modulates a source signal with 1 MHz, which is high enough to suppress a rise of ASE level, to obtain high accuracy. Specifications Wavelength range 1） C-Band mode （1520 to 1580 nm） L-Band mode （1560 to 1620 nm） DUT input power range 2） -45 dBm to +10 dBm DUT output power range +24 dBm or less Accuracy 3） Gain ±0.2 dB NF ±0.3 dB DUT input power ±0.2 dB DUT output power ±0.2 dB Reproducibility 3） Gain ±0.1 dB NF ±0.2 dB DUT input power ±0.1 dB DUT output power ±0.1 dB Applicable fiber Single mode 10/125 μm Applicable optical connector FC （SPC） Minimum channel spacing 4） 25 GHz Maximum channel 4） 200 channels Measurement time Approx. 5 minutes （40 channels） Warm-up time Approx. 1 hour after power on Measurement function Wavelength dependence, input power dependence, stability Display function Wavelength-Gain, wavelength-NF, input-output, input-Gain, input-NF, time-gain, time-NF, time-input, time-output, measurement data list, 1-, 2- and 4-waveform display Calibration function Input power, output power, OSA effective resolution, DUT delay time Data storage FDD （3.5-inch 2HD, 1.2/1.44MB）, internal memory （for 32 waveforms） Printer Built-in high-speed printer Interfaces GP-IB （2-ports）, video output （VGA compatible） Display 9.4-inch color LCD Power requirements AC100 to 120 V, AC200 to 240 V, 48 to 63 Hz, approx. 200 VA Environmental conditions Operating temperature: 15 to 35°C Storage temperature: -10 to 50°C Humidity: 80% or less （no condensation） Dimensions and mass Approx. 425（W） x 222（H） x 450（D） mm, approx. 20 kg Notes 1） Either C-Band mode or L-Band mode 2） Maximum input power is related to the output power of light source. 3） ±1°C, between 15 and 35°C 4） In conbination with AQ6317B optical spectrum an