Abstract
In this letter, we discuss a novel integration of a wavelength demultiplexer with a pair of uni-traveling-carrier photodiodes (UTC-PDs). With this integrated module, we could separate incoming wavelengths of 1530 and 1550 nm, which are near the wavelengths utilized for digital and analog signal transmission in coarse wavelength-division multiplexing (CWDM) systems. The integrated UTC-PDs exhibited the following advantages: a wide 3-dB bandwidth (25 GHz), a reasonable responsivity (0.35 A/W), and a high-saturation-current (>17 mA). A low level of radio frequency crosstalk between the two photodiodes (less than -15 dB) could also be achieved for a wide frequency range (near DC to 40 GHz). This is low enough for the multichannel receivers in a WDM broadcast system. In addition, by use of our module, we demonstrated digital/analog signals co-transmission and demultiplexing with speeds of 2.5 Gb/s at optical wavelengths of 1530 and 1550 nm.
| Original language | English |
|---|---|
| Pages (from-to) | 1433-1435 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 19 |
| Issue number | 19 |
| DOIs | |
| State | Published - 1 Oct 2007 |
Keywords
- Coarse wavelength-division multiplexing (CWDM)
- Demultiplexer
- Photodiodes