The spectral reflectance and responsivity of Ge- and InGaAs-photodiodes at (nearly) normal and oblique incidence (45°) were investigated. The derived data allow a calculation of the photodiodes responsivities for any incident angle. The measurements were carried out with s- and p-polarized radiation in the wavelength range from 1260 to 1640\text{\hspace{0.17em} nm} . The spectral reflectance of the photodiodes was modeled by using the matrix approach developed for thin-film optical assemblies. The comparison between the calculated and measured reflectance shows a difference of less than 2% for the Ge-photodiode. For the InGaAs-photodiode, the differences between measured and calculated reflectance are larger, i.e., up to 6% for wavelengths between 1380 and \text{1580 \hspace{0.17em} nm} . Despite the larger differences between calculated and measured spectral reflectances for the InGaAs-photodiode, the difference between calculated and measured spectral responsivity is even smaller for the InGaAs-photodiode than for the Ge-photodiode, i.e., \le \text{1.2\%} for the InGaAs-photodiode compared to \le \text{2.2\%} for the Ge-photodiode. This is because the difference in responsivity is strongly correlated to the absolute spectral reflectance level, which is much lower for the InGaAs-photodiode. This observation also shows the importance of having small reflectances, i.e., appropriate antireflection coatings for the photodiodes. The relative standard uncertainty associated with the modeled spectral responsivity is about 2.2% for the Ge-photodiode and about 1.2% for the InGaAs-photodiode for any incident angle over the whole spectral range measured. The data obtained for the photodiodes allow the calculation of the spectral responsivity of Ge- and InGaAs-trap detectors and the comparison with experimental results.

© 2007 Optical Society of America

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

Related Journal Articles

• Frequency comb generation using femtosecond pulses and cross-phase modulation in optical fiber at arbitrary center frequencies (OL)
• Comments on "Absolute linearity measurements on a PbS detector in the infrared" (AO)
• Reply to comments on "Absolute linearity measurements on a PbS detector in the infrared" (AO)
• Cylinder gauge measurement using a position sensitive detector (AO)
• Determination of the beam centroid of an obstructed focused Gaussian laser beam (AO)

Related Conference Papers

• High sensitive optical sampling oscilloscope simultaneous coverage of both C and L bands
• A high power and high efficiency photodiode with an evanescently coupled graded index waveguide for 40 gbps applications
• 40 GBIT/S eyepttern of a photoreceiver OEIC with monolithically intergrated spot size converter
• Photo-Electromotive-Force Sensor-Based Laser Vibrometer with Gain-Switched Laser Diode
• Optical Control of Microwave Phase