Time-measuring device

A timepiece, comprising:

• an electro-optical converter device having at least one electro-optical converter,
• an opto-electric converter device,
• a first signal path which leads into the opto-electric converter device via a first waveguide,
• a second signal path which leads into the opto-electric converter device directly or via a second waveguide,
• a control device, and
• a signal generating device,
• wherein:
• the electro-optical converter device is configured for feeding a first clocked light signal into the first waveguide and a second clocked light signal into the second signal path,
• the opto-electric converter device is configured for generating a first electrical signal based on the first clocked light signal, and a second electrical signal based on the second clocked light signal,
• the first signal path and the second signal path are configured such that a transit time of the first clocked light signal in the first signal path and the transit time of the second clocked light signal in the second signal path are different from one another,
• the control device is configured to generate a control signal based on the phase difference between the first electrical signal and the second electrical signal, and to actuate the electro-optical converter device, for generating the two light signals, by means of the control signal,
• the signal generating device is configured for generating a signal that clocks the time, based on a frequency of the control signal, and
• the timepiece comprises a clock display device for displaying the time based on the signal.