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  • Name: Optical differential phase shift keying demodulator
  • Numbering: 008
  • Release time: 2015-03-04
  • Views : 64

Optical differential phase shift keying (DPSK) is a relatively superior modulation format, providing high receiver sensitivity, high-speed transmission of nonlinear effects in the transmission and coherent mixing crosstalk have a higher tolerance. DPSK modulation signal is to obtain data from the phase difference of adjacent signal bits. DPSK demodulator converts phase modulation amplitude modulation, so that the strength of conventional detectors to detect the DPSK signal.

Optoplex of light differential phase shift keying demodulator, also known as a delay line interferometer (DLI), phase modulation can be the entire C + L-band is converted into amplitude modulation, which supports data transfer rate of 2.5, 10 or 40Gb / s. DPSK demodulator can be used for commercial, defense and space exploration in the phase modulated optical communication systems. The device without the need for major capital investment conditions, in the current and next-generation systems to improve signal quality and performance to meet the ever-increasing higher data rates and more complex transmission needs to play a key role. The device without the need for major capital investment conditions, in the current and next-generation systems to improve signal quality and performance to meet the ever-increasing higher data rates and more complex transmission needs to play a key role. About our standard pure passive devices, temperature-related frequency drift is only ~ 0.02 GHz / ° C. In addition, this demodulator over the entire operating temperature range associated with the polarization phase shift of less than 2 degrees, and with a high extinction ratio . Optoplex the DPSK demodulator can be fully adjustable, colorless or pure tunable passive.

Optoplex provides three types of DPSK demodulator:

1. Fully adjustable DPSK demodulator

2. pure passive DPSK demodulator

3. Half (colorless) Adjustable DPSK demodulator

Fully adjustable DPSK demodulator: a fully adjustable DPSK demodulator can adjust the phase of the spectrum while maintaining FSR unchanged.

Pure passive DPSK demodulator: pure passive DPSK demodulator avoid complex feedback control algorithm and power systems involved. As indicated by its name, purely passive DPSK demodulator does not have the ability to adjust the spectral phase of these parameters in the factory was fixed. "Passive" means that this device does not contain spectral phase modulation of the other pieces.

Semi-adjustable DPSK demodulator: Given the signal path TDFS dislocation factors, and not with the FSR TDFS smaller decreases purely passive DPSK demodulator will not work in low-rate system. Therefore, Optoplex combines the advantages of fully adjustable and pure passive DPSK demodulator, the development of semi-adjustable DPSK demodulator, also known as colorless DPSK demodulator. Colorless DPSK demodulator is a special adjustable DPSK demodulator, which passive and pure DPSK demodulator having a very similar optical properties, but it has several GHz tuning capability of. Colorless DPSK demodulator FSR is 25GHz or may 50GHz (respectively, for 20Gb / s and 40Gb / s rate), can be used to an integer multiple of the channel spacing FSR system. Therefore, Optoplex colorless DPSK demodulator is fully adjustable and pure passive DPSK demodulator combined strengths to meet the increasingly stringent system vendor requirements.

We also produce double the rate of DPSK demodulator. Visit DQPSK demodulator.

  

Optical DPSK demodulator features and benefits

● Non-thermal design

● single device covering the entire C + L-band

● Low temperature-dependent frequency shift

● Low polarization-dependent frequency shift

● Wide bandwidth

● Low insertion and polarization dependent loss

● Acceptable high power input

● passive, semi-adjustable, fully adjustable

● Suitable for RZ and NRZ modulation format

● Single or double data rate

● comply with Telcordia GR-1221 standard

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