Self-injection locked phase-locked loop OEO

Zhang, Li; Poddar, Ajay K.; Rohde, Ulrich L.; Daryoush, A.S.

doi:10.1109/imarc.2013.6777720

Cited by 16 publications

(7 citation statements)

References 22 publications

(34 reference statements)

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“…The phase error detected from the IF port is amplified by the (LPFA) and used to control the VCO frequency. Phase noise of SPLL can be expressed as [14]:…”

Section: A Characteristics Of X-band Oscillatorsmentioning

confidence: 99%

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Oscillator phase noise reduction using self-injection locked and phase locked loop (SILPLL)

Zhang

Daryoush

Poddar

et al. 2014

2014 IEEE International Frequency Control Symposium (FCS)

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Experimental result of phase noise reduction are presented for microwave oscillators. Both self-injection locking (IL) and self-phase locking (PLL) are combined to provide forced stable oscillation using self-ILPLL (SILPLL) for the first time. Analytical prediction for optimum performance of self-ILPLL is provided reaching unprecedented levels of -148dBc/Hz at 10kHz offset carrier for X-band oscillator.Keywords-VCO, self-injection locking, self-phase locked loop, self-injection locked phase locked loop, fiber delay line, frequency discriminator.

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“…The phase error detected from the IF port is amplified by the (LPFA) and used to control the VCO frequency. Phase noise of SPLL can be expressed as [14]:…”

Section: A Characteristics Of X-band Oscillatorsmentioning

confidence: 99%

“…1, where a long optical fiber is used to provide forced injection (SIL path) to VCO signal after detection by a photodetector (DSC50S) and amplification by an amplifier (Avantek AMT-9634); a final power level of -10dBm is injected to the VCO. Phase noise of SIL is expressed as [14], [15]:…”

Section: Phase Noise Reduction Using Silmentioning

confidence: 99%

Oscillator phase noise reduction using self-injection locked and phase locked loop (SILPLL)

Zhang

Daryoush

Poddar

et al. 2014

2014 IEEE International Frequency Control Symposium (FCS)

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“…The single-loop OEO can be combined with an optical fiber path selector to measure the free spectral range (FSR) and side-mode suppression ratio (SMSR) of the OEO for different lengths of the optical delay line [53]. There are other applications of OEOs such as an acoustic sensor [54], low-power radio frequency (RF) signal detection [55], phase-locked loops [56][57][58], parity time-symmetric OEO [59,60], silicon micro-ring-based OEO [61] and linear frequency-modulated waveform generation [62], etc.…”

Section: Introductionmentioning

confidence: 99%

Opto-Electronic Oscillators for Micro- and Millimeter Wave Signal Generation

Ilgaz

Batagelj

2021

Electronics

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High-frequency signal oscillators are devices needed for a variety of scientific disciplines. One of their fundamental requirements is low phase noise in the micro- and millimeter wave ranges. The opto-electronic oscillator (OEO) is a good candidate for this, as it is capable of generating a signal with very low phase noise in the micro- and millimeter wave ranges. The OEO consists of an optical resonator with electrical feedback components. The optical components form a delay line, which has the advantage that the phase noise is independent of the oscillator’s frequency. Furthermore, by using a long delay line, the phase noise characteristics of the oscillator are improved. This makes it possible to widen the range of possible OEO applications. In this paper we have reviewed the state of the art for OEOs and micro- and millimeter wave signal generation as well as new developments for OEOs and the use of OEOs in a variety of applications. In addition, a possible implementation of a centralized OEO signal distribution as a local oscillator for a 5G radio access network (RAN) is demonstrated.

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“…The long length of the delay line improves the close-in to carrier phase noise at a square of the delay line length, but unfortunately it satisfies many other oscillation modes within the passband of a narrowband electrical filter. A high quality (Q) factor mechanically tuned metallic cavity filter is employed for the generation of X-band oscillation signals over [8][9][10][11][12] GHz. The classic OEO performance is primarily limited based on the close loop behavior [4] , and its frequency tuning is quite limited because of the fixed passband characteristic of a metallic cavity filter.…”

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confidence: 99%

“…At an offset frequency of 10 kHz, the 100 m main loop provides a −105 dBc∕Hz close-in to carrier phase noise, while the 500 and 1000 m OEO provides −118 and −124 dBc∕Hz, respectively. A lower close-in to carrier phase noise performance is expected for the 1000 m length due to a higher oscillator Q factor [9] . The achieved results follow a 20 dB/decade slope for fiber delay lengths before the offset frequency of 70 kHz.…”

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confidence: 99%

Frequency synthesis of forced opto-electronic oscillators at the X-band

et al. 2017

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Ultra-low phase noise performance is required for frequency agile local oscillators, which are the core for high resolution imagers, spectrum analyzers, and high speed data communications. A forced opto-electronic oscillator (OEO) benefits from frequency stabilization techniques for realizing a clean and low phase noise source at microwave and millimeter wave frequencies. Forced oscillation techniques of self-injection locking and self-phase lock loop are combined to provide an ultra-low oscillator phase noise both close-in and far-away from the carrier frequency, while a tunable yttrium iron garnet microwave filter combined with a wavelength tuned transversal filter are employed to implement both coarse and fine frequency tuning for a tunable X-band OEO. A phase noise of −137 dBc∕Hz at an offset frequency of 10 kHz is achieved covering the frequencies of 9 to 11 GHz with a fine frequency tuning resolution of 44 Hz/pm and coarse tuning of 25 MHz/mA. Moreover, the long term stability of the output signal is tested, and a maximum frequency drift of 2 kHz is measured within 60 min for the X-band synthesizer.OCIS Microwave and millimeter wave local oscillators with a low close-in to carrier phase noise are required for high angular resolution phase shift keyed modulation/demodulation at a high speed data transmission and high temporal accuracy radar imagers [1] . Opto-electronic oscillators (OEOs) are used as promising way for creating a high frequency radio frequency (RF) signal with a great spectral purity to meet many modern applications. The set-up of a classic OEO [2] at the X-band is described in Fig. 1 within the dotted region, where to achieve the highest spectral purity, a very low noise long fiber delay length is required along with a narrow passband microwave filter. The low relative intensity noise (RIN) fiber laser (Optilab TWL-C-HP-M) along with a high power handling photodetector (Discovery Semiconductors-DSC50S) could provide a low noise figure fiber optic delay line. Moreover, a dual drive Mach-Zehnder modulator (DD-MZM) is used to reduce the noise figure of an optical link [3] . The long length of the delay line improves the close-in to carrier phase noise at a square of the delay line length, but unfortunately it satisfies many other oscillation modes within the passband of a narrowband electrical filter. A high quality (Q) factor mechanically tuned metallic cavity filter is employed for the generation of X-band oscillation signals over 8-12 GHz. The classic OEO performance is primarily limited based on the close loop behavior [4] , and its frequency tuning is quite limited because of the fixed passband characteristic of a metallic cavity filter. Moreover, the presence of multimode oscillations is to be minimized using optical transversal concepts by rejecting the side-mode [5] . In order to achieve the fast broadband tuning required in frequency synthesizers, an electronically tuned yttrium iron garnet (YIG) [6] filter will be introduced in this Letter to replace the role of the mechanically tune...

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Self-injection locked phase-locked loop OEO

Abstract: A novel optoelectronic oscillator (OEO) circuit using self-injection locked phase-locked loop (SILPLL) technique is reported for high frequency stable ultra-low phase noise signal source applications.

Cited by 16 publications

References 22 publications

Oscillator phase noise reduction using self-injection locked and phase locked loop (SILPLL)

Oscillator phase noise reduction using self-injection locked and phase locked loop (SILPLL)

Opto-Electronic Oscillators for Micro- and Millimeter Wave Signal Generation

Frequency synthesis of forced opto-electronic oscillators at the X-band

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