Ultrafast detectors: specification in detail.

TeraSense® researchers and engineers just finished a full detailed characterization of ultrafast TeraSense® detector and are pleased to present the refined specifications. Below is a list of parameters and graphs

of frequency characteristics with brief remarks.

• Response time 300 ps
• Spectral Range 50 GHz- 0.7 THz
• Responsivity 1 V/W
• Noise Equivalent Power 500 pW/√Hz
• SMA output connector
• No power supply needed
• Compact size: 23 х 16 х 13 (mm)
• Customer-focused solutions

TeraSense® detector response time was measured using mixing method. Graph on the left represents photoresponse of the detector (i. e. mixed signal amplitude) vs. differential frequency of base and reference signals Δf. Local reference oscillator frequency was kept at 97 GHz, power of both base and reference signals was constant. Photoresponse cut-off differential frequency f0 = 3.75 GHz, which corresponds to response time of 300 ps.

TeraSense® detector is sensitive in a wide frequency range. However, due to radiation interference within the bulk of detector’s crystal, its responsivity has a multiband nature (see example in Figure to the right). Our specialists can tune positions of the peaks in responsivity curve at manufacturing stage. Clients can choose and order frequencies / frequency ranges required when making purchase request.