Journal ArticleDOI
High-speed modulation of an electrooptic directional coupler
TLDR
In this paper, a LiNbO 3 :Ti directional coupler driven by an RF signal has been tested at 1.06 μm over a large modulation bandwidth, achieving a 16 dB extinction ratio with a driving power of approximately 50μW/MHz.Abstract:
A LiNbO 3 :Ti directional coupler driven by an RF signal has been tested at 1.06 μm over a large modulation bandwidth. An analytical model has been developed leading to simple usable expressions to describe the theoretical dependence of the frequency spectrum of sinusoidally modulated light. The frequency response has been measured with a scanning Fabry-Perot and also with a high-speed photodiode. Both methods provided results which are in good agreement. The 9 mm long switch exhibited a 2.5 GHz bandwidth; a 16 dB extinction ratio has been achieved with a driving power of approximately 50μW/MHz. The confirmation of practical modulation response expressions shows the advantage of the optical spectrum observation, which is a very simple measurement method without any bandwidth limitation. In addition, this method has the advantage of remaining quite accurate even for large modulation signals.read more
Citations
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Journal ArticleDOI
Waveguide Electrooptic Modulators
TL;DR: In this article, the authors give a tutorial review and brief summary of the present status of waveguide electrooptic modulators, and present state-of-the-art waveguide modulators are discussed.
Journal ArticleDOI
Analysis of titanium diffused planar optical waveguides in lithium niobate
G. Griffiths,R. Esdaile +1 more
TL;DR: In this paper, the effects of diffusion time, temperature, and ambient atmosphere on mode structure, surface refractive index, and profile, waveguide depth, surface morphology, and composition are described.
Journal ArticleDOI
Reaching the shot noise limit in the polarization measurement of individual nanosecond light pulses
TL;DR: Using a balanced dual-channel polarimeter and fast photodiodes coupled to low-noise charge integrators, the authors demonstrated precise polarization detection of individual light pulses in the nanosecond time-scale, with a noise very close to the shot noise limit.
Journal ArticleDOI
Experimental progress using nonlinear optics for precision measurements of the nuclear weak charge in the 6S-7S Cs transition
TL;DR: In this article, a calibration procedure circumventing all complications from nonlinear processes is presented, which can be exploited to enhance the parity violating asymmetry in the forbidden 6S-7S Cs transition.
Journal ArticleDOI
Optical coupling between single-mode semiconductor lasers and strip waveguides
TL;DR: In this article, the optimum conditions for coupling a singlemode semiconductor laser to a single-mode strip waveguide, when both the laser and the waveguide have asymmetric optical beam profiles, were described.
References
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Journal ArticleDOI
Switched directional couplers with alternating ΔΒ
H. Kogelnik,R. Schmidt +1 more
TL;DR: Coupled waveguide structures with sections of alternating phase mismatch are proposed as switched directional coupler configurations in which complete conversion of light from one guide to the other can be achieved by an electrical adjustment.
Journal ArticleDOI
Electrically switched optical directional coupler: Cobra
M. Papuchon,Y. Combemale,X. Mathieu,D. B. Ostrowsky,L. Reiber,A. M. Roy,B. Sejourne,M. Werner +7 more
TL;DR: In this paper, an integrated optical switch/modulator consisting of an active directional coupler with a novel electrode configuration is presented, in titanium-diffused lithium niobate.
Journal ArticleDOI
Electro‐optically switched coupler with stepped Δβ reversal using Ti‐diffused LiNbO3 waveguides
R. V. Schmidt,H. Kogelnik +1 more
TL;DR: In this article, an experimental electro-optical switched directional coupler is reported which is formed in LiNbO3 by diffused Ti strip waveguides and uses stepped reversed phase mismatching to provide electrical adjustment of both switch states.
Journal ArticleDOI
GaAs electro‐optic directional‐coupler switch
TL;DR: In this article, the authors report the fabrication and testing of a GaAs electro-optic directional-coupler (EDC) switch in which the fraction of light coupled from one waveguide channel to the other can be controlled by an applied electric field.
Journal ArticleDOI
Broad-band traveling-wave modulator using a LiNbO 3 optical waveguide
M. Izutsu,Y. Yamane,Tadasi Sueta +2 more
TL;DR: A traveling-wave electrooptic phase modulator using a Ti-in-diffused LiNbO 3 optical waveguide was designed and constructed with emphasis placed on broad-band operation.