Detection of Low-Power RF Signals Using a Two Laser Multimode Optoelectronic Oscillator

作者：Devgan Preetpaul S^*; Urick Vincent J; Williams Keith J

来源：IEEE Photonics Technology Letters, 2012, 24(10): 857-859.

DOI：10.1109/LPT.2012.2189203

• Dual wavelength
• optoelectronic oscillator
• radio frequency signal detection

We present a two laser, multimode optoelectronic oscillator (OEO) for detecting unknown low-power RF signals. By switching between one or two lasers, the OEO cavity will become sensitive to an interleaved set of frequencies. The system has an input sensitivity of -78.4 dBm, which is only 14.2 dB higher than the thermal limit for a 140-MHz bandwidth. In addition, mode spacing has been increased to 100 MHz, a 20 times increase from previous demonstrations.

• 出版日期2012-5-15