MAP-200 Polarization Controller Module, MPCX-C1

Transcription

1 MA-2 olarization Controller Module, MCX-C The Multiple Application latform (MA-2) olarization Control Module (mcx-c) is a single slot high-speed polarization scrambler, controller and stabilizer. Based on ithium-niobate, the electro-optic wave-plates have the response time required by the most demanding polarization management applications. With the rise of coherent modulation formats and polarization multiplex systems, there is a new premium on understanding the way the polarization state of these signals interact with single-mode fiber. The mcx-c module is designed to enable these tests, not only in the laboratory, but also in the transition of these tests to a manufacturing environment. At its core, the mcx-c cascades eight quarter wave-plates; each calibrated over the C+ band. These wave-plates can be rotated at high speed and are reset-free (endlessly rotatable) to control the state of polarization (SO). Simple, predefined, rate-programmable, and polarization scrambling modes are provided which can achieve rates up to 3M rad/s. Alternatively, user-defined tables can be uploaded for custom scrambling patterns. With the proprietary SO feedback option, two features are unlocked. The first enables an identified state to hold while the mcx-c counteracts normal environmental drift and the second simplifies the automatic generation of unique diagnostic scrambling modes. Features and Benefits igh-speed polarization scrambler, rate programmable from. rad/s to 3. Mrad/sec Operation in C+ band with less than 3dB of Insertion oss Uniform scrambling by design, independent of input state of polarization Six advanced scrambling modes including ayleigh, andom and ing olarization stabilization and return-tostate capability with proprietary SO feedback option Manual polarization control via classic waveplates Applications hotonic communication test automation G+ coherent interface testing Temporal depolarizer for loss, gain and D min/max measurements Stabilization and tracking of target SO Compliance CE, CSA/U/IEC6, and XI Class C requirements (when installed in a MA chassis) Data Sheet

2 The mcx-c module, as part of the MA-2 family, is an Ethernet or GIB-controlled modular instrument that can be directly managed from your C-based automation system. A member of the ightdirect Family of MA-2 modules, the mcx-c can be deployed in the compact MA-22C 2-slot chassis or the larger 3 and 8 slot rack-mount chassis systems (MA-23B or MA-28). Alongside many other modules, such as amplifiers, precision attenuators, power meters and spectrum analyzers; the MA-2 is the ideal, modular photonics test platform for G+ test applications. MA-2 ightdirect Family of modules Basic Operation and Control The mcx-c has two basic operational modes: Direct Wave-plate Control In wave-plate mode, the angles of individual wave-plates can be controlled directly. Static angles or rotational velocities can be set. The user can select between two control modes; two quarter waveplates (- configuration) or two quarter waveplates separated by a half-wave-plate (-- configuration). Full control over each element is provided and user settings can be saved and recalled as presets. Scrambling Six predefined scrambling patterns are provided as well as one user definable mode. Scrambling modes are differentiated by three outcomes; the rate at which the SO changes, the distribution of angle changes (as viewed on the oincare sphere) and finally the coverage of the oincare sphere. The MCX-C GUI is simple and intuitive. All commands can be executed by SCI as an alternative 2 MA-2 olarization Controller Module, MCX-C

3 SO Feedback Option SO Feedback is the option that enables monitoring of the output state of polarization. While not a full polarimeter, several key features are enabled in a very cost effective manner. Automated ing Alignment A great circle through the equator is a unique and powerful scrambling mode. It does however require a very specific input polarization state. With SO Feedback enabled, the mcx-c automatically adjusts itself to ensure this pattern is achieved with no manual intervention or external feedback. State Tracking and eturn olding or returning to a specific SO is also enabled. This can be very powerful when test cases require alternating between a specific SO and scrambling or when longer term testing is required and drift of the SO is not desirable. (z-axis) º (,,) -.5 (,,) (,,) C (,,) (,,).5 (y-axis).5 +45º (,,) -.5 S (x-axis) Drift (Uncontrolled) Drift (Stabilized) 6 min 6 min Uncontrolled Drift observed over hour Stabilized Drift observed over hour (,,) 35 3 Distribution of Angles from Centroid measured over hour (,,) 8 7 Distribution of Angles from Centroid measured over hour (z-axis) (,,) -45º (,,) +45º (,,) (,,) Counts (z-axis) º (,,) (,,) (,,) +45º (,,) Counts C (,,).5 (y-axis) S (x-axis) Angular Deviation from Centroid (degrees) -.5 (y-axis).5 C (,,) S (x-axis) Angular Deviation from Centroid (degrees) With the stabilization mode enabled, a tagged SO can be held 3 MA-2 olarization Controller Module, MCX-C

4 Scrambling Dynamics The mcx-c has six pre-defined scrambling patterns available and one user defined mode. These patterns allow the user to tailor the level of complexity of the scrambling. Scrambling complexity is a function of the rate distributions and sphere coverage. andom (,,) andom scrambling is characterized by uniform coverage of the oincaré sphere. The continuous evolution of the SO can generate change rates of up to 3 Mrad/s and as low as rad/s. For applications requiring rapid depolarization, this mode will generate a DO of <5% in less than µs º (,,).2 (z-axis) (,,) (,,) C (,,).5 (y-axis) +45º (,,) S (x-axis) ayleigh Distribution This mode has full sphere coverage. The instantaneous rate of change follows a ayleigh disribution which is biased towards lower rates but does occasionally have very high rates. This mode can be modified by changing the mean of the distribution. This pattern is often used for fiber emulation. ing (ideally used with SO Feedback) Ideal ring modes form great circles and orbit the oincaré sphere. They generate a single constant ΔSO frequency. For modules with SO feedback, the ring trajectory can be auto-aligned to create a great circle pattern. un open loop, the orientation of the ring will depend on the input SO. This pattern is ideal for generating a depolarized signal with a constant ΔSO signature º (,,).2 (z-axis) º (,,).2 (z-axis) (,,) (,,) (,,) C (,,).5 (y-axis) (,,) (,,) (,,) C (,,).5 (y-axis) +45º (,,) S (x-axis) +45º (,,) S (x-axis) olar ing attern (ideally used with SO Feedback) (,,) Starting from an auto-aligned ring pattern, an additional rotational component can be added to create the olar ing attern. This pattern maintains a constant ΔSO signature, but has the advantage of fully covering all states of polarization as the great circles rotate. Oscillating ing attern (ideally used with SO Feedback) The oscillating ring pattern adds a rate component to a ring to transition from north-pole to south-pole. This mode also has complete sphere coverage, but adds the additional complexity as the ΔSO rate changes with the diameter of the orbit. andom ing attern The random ring pattern is a combination of the polar ring and the oscillating ring. It is very similar to a full random pattern. This mode is ideal for test cases where the SO rate distribution complexity is being increased incrementally from an aligned ring state. Discrete (User defined Scrambling) User defined tables with up to entries can be created and stepped through. These selected states allow the user to create specific patterns º (,,).2 (z-axis) º (,,).2 (z-axis) º (,,).2 (z-axis) (,,) (,,) C (,,).5 (y-axis) (,,) (,,) (,,) C (,,).5 (y-axis) (,,) (,,) (,,) C (,,).5 (y-axis) +45º (,,) S (x-axis) +45º (,,) S (x-axis) +45º (,,) S (x-axis) 4 MA-2 olarization Controller Module, MCX-C

5 Specifications Standard SO Feedback Option Basic Optical Specifications Wavelength ange nm Max Input ower +2 dbm Insertion oss 2 < 3 db < 3.5 db olarization Dependent oss <.2dB eturn oss > 4 db Manual Waveplate Mode Control Modes [W + W] or [W + W + W] Waveplate otation Continuous (reset free) Waveplate Angle Setting esolution. Maximum Waveplate otation Frequency 4 kz otation Frequency Setting esolution. z Scrambling Mode andom Maximum Scrambling ate ange (oincaré space). rad/s - 3. Mrad/s Maximum Scrambling ate esolution (oincaré space) ± % of most significant digit ayleigh 7 Mode Scrambling ate ange (oincaré space). rad/s - 35 krad/s Maximum Scrambling ate esolution (oincaré space) ± % of most significant digit ing ing Auto-Align Time 5 s (typical) N/A alf-waveplate otational Frequency ange (oincaré space) 2.5 rad/s - Mrad/s alf-waveplate otational Frequency ange (Waveplate space). z - 4 kz Other Supported ing modes Oscillating, andom, olar Discrete (User Tables) Maximum Table ength Angle Transition ate (Optical ΔSO slew rate) 8 < 6 μs SO Tracking,4 olding Accuracy (Typical Controlled Environment) 3 5 min User Defined SO < 5 (typical) 5 min mcx Determined Fixed State < 3 (typical) esponse Time to Stabilize an Input Impulse ΔSO 5 <.3 s (typical) N/A Maximum Input Signal ΔSO rate 6 4 /s Min / Max Input ower ange -5 to 2 dbm ecall of User Defined SO (W+W mode only) ms Mechanical and Environmental Operating Temperature ange to 5 C Warm-up Time 6 min Storage Temperature -3 to 7 C Dimensions 4.6cm x 3.26cm x 37.3cm Weight.95 kg. Guaranteed over 3 to 33 C 2. Excludes the loss from one optical connector C +/- 3 C, normal fiber management on benchtop 4. equires stable optical power +/-.db to mcx and signal with >3% DO 5. arge SO excursions may require a two-step process to ensure original position is maintained 6. During continuous ΔSO variation momentary excursions from target are expected. 9% of the time excursions from target will be less than 2 during dynamic measurements. Once the input variation ceases the control loop will re-acquire the target within.3s (typical) 7. arameters specified as the mode, σ, of the ayleigh distribution, where (f;σ)=(f/ σ^2)*exp(-f^2 / (2*σ^2)) 8. Software overhead not included 5 MA-2 olarization Controller Module, MCX-C

6 art Numbers art Number MCX-CSS-M-MFA MCX-CSS-M-MF MCX-CSS-M-MSC MCX-CSS-M-MSU art Number MCX-CSFS-M-MFA MCX-CSFS-M-MF MCX-CSFS-M-MSC MCX-CSFS-M-MSU igh-speed polarization scrambler/controller FC/AC Connectors FC/C Connectors SC/C Connectors SC/AC Connectors igh-speed polarization scrambler/controller SO Feedback Option FC/AC Connectors FC/C Connectors SC/C Connectors SC/AC Connectors Contact Us GO IAI ( ) To reach the iavi office nearest you, visit viavisolutions.com/contacts. 26 iavi Solutions Inc. roduct specifications and descriptions in this document are subject to change without notice. mpcx-c-ds-lab-nse-ae viavisolutions.com