光貿易株式会社
〒113-0034
東京都文京区湯島3-13-8
湯島不二ビル301
電話番号：03-3832-3117
FAX番号 ：03-3832-3118
Optoplex Corporation社
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■メーカーの紹介 |
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| ■製品概要／Product Overview | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Optical differential-phase shift keying (DPSK) provides a desired modulation format that offers high receiver sensitivity, high tolerance to major nonlinear effects in high-speed transmissions, and high tolerance to coherent crosstalk. In DPSK, data information is carried by the optical phase difference between adjacent bits. For direct detection of DPSK signal (by conventional intensity detectors), a DPSK demodulator is needed to convert the phase-coded signal into an intensity-coded signal. Optoplex's Optical DPSK Demodulator, also known as Delay Line Interferometer (DLI), converts phase modulation to amplitude modulation over the entire C+L band in support of data transmission rates of 2.5, 10 or 40 Gb/s. The DPSK Demodulator is designed for phase modulated optical communication systems utilized in commercial, defense and space exploration markets. The DPSK device plays a key role in improving signal quality and performance to meet the expanding demand for higher data rates and more complex transmission formats within current and next generation systems without major capital expenditure. Optoplex's DPSK Demodulator is based on a patented free-space optical design, which is compact, athermal and polarization-independent. The measured frequency drift over temperature is only ~0.02 GHz/°C for our standard passive device. Further, this DPSK Demodulator exhibits a total polarization-dependent phase shift of less than 2 degrees over the entire operating temperature range with a high extinction ratio. Optoplex's DPSK Demodulators can be configured to be fully tunable, semi-tunable or purely passive. Dual-Rate DPSK Demodulator is also available. Standard Specifications of DPSK Demodulator
1. Only typical values are listed. Optoplex can provide devices with FSR ranging from 2.5 to 160 GHz. 2. Over the stated spectral and operating temperature ranges and all polarization states. 3. Defined as the time required to reach half-way from the starting and ending points. 4. Excluding two collimator sleeves extending out from the two adjacent sides by 21 mm with diameter of 8 mm. 5. Excluding two collimator sleeves extending out from one shorter side by 17 mm with diameter of 6.3 mm. Typical Performance of DPSK Demodulator  |
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PDFファイル： 335 kb |
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| ■特徴／Key Features |
| - Athermal design - C+L band coverage by a single device - Low temperature-dependent frequency shift (TDFS) - Low polarization-dependent frequency shift (PDFS) - Wide bandwidth - Low insertion loss & PDL - High power handling - Passive, semi-tunable and fully tunable operation - Suitable for both RZ and NRZ modulation format - Telcordia GR-1221 qualified |
| ■アプリケーション／Application |
| - 2.5, 10, 20 or 40 Gb/s commercial DPSK signal reception - Customized data rate for advanced applications - Data rate optimization - Extend transmission distance |