2007年第4回知的財産翻訳検定＜和文英訳＞
電気・電子工学分野 標準解答

【問 1】

What we claim is:1.

A network-storage-access terminal configured tocommunicate with an authentication server, a processing
server, and a storage device on a network to establish astorage connection between an external device and thestorage device, the network-storage-access terminal
comprising:an interface unit configured to interface
communication with the external device;an authentication processing unit configured toperform predetermined authentication processing together
with the authentication server;
a wireless-connection processing unit configured toreceive connection information of the storage device fromthe processing server, to establish a path to the storage
device on the network on the basis of the connection
information, and to transfer to the external device storage
information including at least a folder name andauthorization information associated with a storage area inthe storage device to cause the external device torecognize the storage device accessible through the storage
connection; anda data processing-and-converting unit configured toperform predetermined data processing and data conversion
on data received from the external device and to transfer
resultant data to the storage device through the storage
connection.

【問 2】

An optical frequency shifter that can shift thefrequency (wavelength) of incident light by a predeterminedamount is one example of devices that are of criticalimportance in a wide range of fields, such as
optoelectronics and quantum electronics, including thoseused in optical communications systems, optical measurement
apparatuses, and spectroscopic instruments. Various methodsof optical frequency shifting have been proposed for such
optical frequency shifters.
As one example, an optical frequency shifter thatuses the acoustooptic effect is currently available on themarket. This optical frequency shifter utilizes thediffraction of light by an acoustic wave (i.e., acompression and rarefaction wave) propagating through acrystal. The optical frequency shifter operating according
to this principle, however, has an operating frequency withan upper limit of a few hundred megahertz, which isrelatively low. This is due to the problem of extremely
high propagation loss of an acoustic wave propagating
through a crystal in the high-frequency region, as well as
the fundamental problem of the wavelength of an acoustic
wave being smaller than that of a light wave, thus notexperiencing diffraction, in a high-frequency region on theorder of 1 GHz or greater. As a result, it is not possible
to increase the amount of shift in optical frequency withthe above-described optical frequency shifting method.

【問 3】In Fig. 1, a local oscillator circuit 10 includes an
LC resonant circuit which includes a coil L and a capacitor
C1, and a transistor TR which amplifies an oscillating
current generated by the coil L and capacitor C1. The coil
L has one end connected to ground via a diode D4, and atuning voltage VT is applied to that end of the coil L viaa resistor R2. In addition, the other end of the coil L isconnected to ground via a diode D3 and a resistor R1, and anode between the diode D3 and the resistor R1 is connected
to one end of the capacitor C1. The other end of thecapacitor C1 is connected to a base of the transistor TR
and is also connected to ground via a resistor R5. A
collector of the transistor TR is connected to a constantvoltage power source +B via a resistor R3 and also to thebase via a resistor R4. In addition, an emitter of thetransistor TR is connected to ground via a capacitor C2 andalso via a resistor R6.