scispace - formally typeset
Search or ask a question
Topic

Injection locking

About: Injection locking is a research topic. Over the lifetime, 4567 publications have been published within this topic receiving 60942 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, a quasi-optical power combiner for a five-element in-line oscillator array is experimentally investigated at 150 GHz, which consists of a periodic dielectric phase grating (hologram) which transforms the near-field of a rectangular horn antenna array into a pseudo-plane wave.
Abstract: A quasi-optical power combiner for a five-element in-line oscillator array is experimentally investigated at 150 GHz. The combiner consists of a periodic dielectric phase grating (hologram) which transforms the near-field of a rectangular horn antenna array into a pseudo-plane wave. The horn array is excited by IMPATT oscillators operating uniformly in both amplitude and phase. A dual offset reflector set-up transforms the pseudo-plane wave to a Gaussian beam which matches the field pattern of a dual mode receiving antenna. Even though an inter-element spacing of 9.5 /spl lambda/ has been chosen, the passive structure gives a power combining efficiency of 74.1%. The power combining oscillator has been operated in both free-running and injection-locked mode. A CW output power of 78.0 mW and 83.5 mW was measured for the free-running and injection-locked oscillator, respectively, which is corresponding to a power combining efficiency of 66.5% and 71.2%, respectively.

30 citations

Proceedings ArticleDOI
17 Jun 2015
TL;DR: A low power on-chip oscillator for system-on-chip designs that introduces a resistive frequency locking loop topology where the equivalent resistance of a switched-capacitor is matched to a temperature-compensated resistor.
Abstract: We present a low power on-chip oscillator for system-on-chip designs. The oscillator introduces a resistive frequency locking loop topology where the equivalent resistance of a switched-capacitor is matched to a temperature-compensated resistor. The approach eliminates the traditional comparator from the oscillation loop, which consumes significant power and limits temperature stability in conventional relaxation oscillators. The oscillator is fabricated in 0.18μm CMOS and exhibits 27.4ppm/oC and <7ppm long-term stability while consuming 99.4nW at 70.4 kHz.

30 citations

Journal ArticleDOI
TL;DR: The results suggest that the ultrashort optical feedback provides the optically injected laser system with an extra degree of freedom to manipulate/improve the characteristics of the P1 microwave oscillation without changing the optical injection condition.
Abstract: This study numerically investigates the enhancement of photonic microwave generation using an optically injected semiconductor laser operating at period-one (P1) nonlinear dynamics through ultrashort optical feedback. For the purpose of practical applications where system miniaturization is generally preferred, a feedback delay time that is one to two orders of magnitude shorter than the relaxation resonance period of a typical laser is emphasized. Various dynamical states that are more complicated than the P1 dynamics can be excited under a number of ultrashort optical feedback conditions. Within the range of the P1 dynamics, on one hand, the frequency of the P1 microwave oscillation can be greatly enhanced by up to more than three folds. Generally speaking, the microwave frequency enhances with the optical feedback power and phase, while it varies saw-wise with the optical feedback delay time. On the other hand, the purity of the P1 microwave oscillation can be highly improved by up to more than three orders of magnitude. In general, the microwave purity improves with the optical feedback power and delay time, while it only varies within an order of magnitude with the optical feedback phase. These results suggest that the ultrashort optical feedback provides the optically injected laser system with an extra degree of freedom to manipulate/improve the characteristics of the P1 microwave oscillation without changing the optical injection condition.

30 citations

Patent
21 Aug 1972
TL;DR: In this paper, a data recovery system includes means for injection locking a variable frequency oscillator directly with raw data from a magnetic recording disc during the beginning of a read data operation.
Abstract: A data recovery system includes means for injection locking a variable frequency oscillator directly with raw data from a magnetic recording disc during the beginning of a read data operation in order to rapidly lock the variable frequency oscillator in phase with the incoming raw data signals. Desirably, the variable frequency oscillator includes an LC oscillator circuit, which provides excellent noise immunity.

30 citations


Network Information
Related Topics (5)
Amplifier
163.9K papers, 1.3M citations
91% related
Resonator
76.5K papers, 1M citations
90% related
Optical fiber
167K papers, 1.8M citations
87% related
CMOS
81.3K papers, 1.1M citations
85% related
Integrated circuit
82.7K papers, 1M citations
85% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202333
202276
2021107
2020145
2019169
2018146