Hidehisa Tazawa

Ring resonator-based electrooptic polymer traveling-wave modulator

The authors report the bandpass-modulation characteristics of a ring resonator-based traveling-wave modulator using an electrooptic polymer AJL8/APC. The use of the traveling-wave electrode makes it possible to achieve an efficient modulation around 28 GHz, which is the free spectral range of the resonator, with a 3-dB bandwidth of 7 GHz. The modulation sensitivity is evaluated by defining an equivalent half-wave voltage of ring modulators. It is shown that the modulator has a potential in the microwave and millimeter-wave photonics applications

Electrooptic Polymer Ring Resonator Modulation up to 165 GHz

Modulation is demonstrated at 84, 111, 139, and 165 GHz resonances of a traveling-wave electrooptic polymer ring-resonator-based modulator. The modulation response is characterized throughout the W-band, illustrating the resonant response at 84 and 111 GHz. A traveling-wave analysis that includes the compound effect of microwave loss and optical/microwave velocity mismatch in a ring-resonator-based modulator is presented and shows a good agreement with experimental results. The ring modulator shows superior performance compared to the Mach-Zehnder modulator in the presence of these limitations when both structures have the same equivalent low-frequency Vpi

Analysis of ring resonator-based traveling-wave modulators

We analyze ring resonator-based traveling-wave modulators that show high modulation efficiency at frequencies around multiples of the free spectral range. The modulators have better tolerance for the optical/microwave velocity mismatch and the loss of the microwave transmission line than traveling-wave Mach-Zehnder modulators.

Polymer microresonator strain sensors

A new class of fiber-based polymer microresonator strain sensors is analyzed and demonstrated. The flexible sensors are fabricated using a liftoff process and are based on the distortion of the microring by strain and the subsequent shift of the resonant wavelength. For the demonstration, a controlled strain was achieved by flexing the sensor. The measured sensitivity at 1310 nm, 0.32 /spl times/ 10/sup -3/ nm//spl mu//spl epsiv/, is in good agreement with the predictions.

Bandwidth of linearized ring resonator assisted Mach-Zehnder modulator

The intermodulation-free dynamic range and the modulation frequency properties of the linearized ring resonator assisted Mach-Zehnder electrooptic modulators are analyzed. The linearization bandwidth of the modulators is limited by the resonant nature of a ring resonator.

Demonstration of 28 GHz ring resonator based electro-optic polymer modulator

We demonstrate a ring resonator based traveling wave electro-optic polymer modulator. Efficient modulation at 28 GHz (FSR of the resonator) with 3 dBe bandwidth of 7 GHz is achieved.

Erratum to "Analysis of ring resonator-based traveling-wave modulations"

In the above-named paper [ibid., vol. 18, no. 1, pp. 211?213, Jan. 1, 2006], the authors changes were not made to Section III. In addition, in Section IV, equation (10) was numbered incorrectly.We apologize for these errors. The correct Sections III and IV are provided.

Electro-Optic Polymer Modulator Based on Ring Resonator for Microwave Photonics Applications

An electro-optic polymer ring resonator modulator with the bandwidth of 5.5 GHz and the free spectral range of 29 GHz is demonstrated for microwave photonics applications. The device shows the high sensitivity of 1 GHz/V.

Millimeter-wave ring resonator based electro-optic polymer modulator

We demonstrate electro-optic modulation at 81 GHz, 108 GHz, and 133 GHz using traveling-wave electro-optic polymer modulators based upon ring resonators. We show that ring resonator type modulators have significant advantages for high-speed modulation.

Linearity and ultra-linearization of ring resonator modulators for sub-octave bandpass analog optical links

The linearity of a ring resonator based modulator is experimentally studied. From the experimental transfer function, the intermodulation-free dynamic range is predicted to be 123 dBHz/sup 4/5/. A scheme to obtain ultra-high linearity is proposed.