Abstract
In this paper, a filterless photonic frequency-octupling scheme is presented. It is implemented by cascading a Sagnac loop with an intensity modulator (IM) in it and a dual-parallel Mach-Zehnder modulator (DPMZM) in series. The Sagnac loop is used to get the ±2nd-order sidebands of LO signal. The following DPMZM is utilized to obtain the ±4th-order sidebands. By photo-detecting the ±4th-order sidebands, mm-wave signal with the eightfold frequency of LO signal can be obtained. The scheme is verified by experiments, and a 32-GHz mm-wave signal is produced with the assistance of a 4-GHz LO signal. A 20-dB optical sideband suppression ratio (OSSR) and a 17-dB electrical spurious suppression ratio (ESSR) are realized, and no extra deterioration of phase noise is observed. Besides, the verification of the frequency tunability is implemented in the experiment.
| Original language | English |
|---|---|
| Pages (from-to) | 229-233 |
| Number of pages | 5 |
| Journal | Optics and Laser Technology |
| Volume | 97 |
| DOIs | |
| State | Published - 1 Dec 2017 |
| Externally published | Yes |
Keywords
- DPMZM modulator
- Frequency octupling
- Frequency tunability
- mm-wave generation
- Phase noise
- Sagnac loop
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