Ascentta Single Mode Fiber Photodiode (1250-1650nm)

The Ascentta single-mode fiber-pigtailed photodiode is an InGaAs PIN photodiode with an integrated single‑mode fiber pigtail, designed for direct optical-to-electrical conversion in fiber‑optic systems. It operates over a wide wavelength range from 1250 nm to 1650 nm, making it suitable for common telecom bands (O-, E-, S-, C-, and L‑bands) including 1310 nm and 1550 nm applications such as optical receivers, test equipment, and monitoring ports.

Key performance parameters include: - Wavelength range: 1250–1650 nm - Responsivity (Vr = –5 V): ≥ 0.85 A/W at 1310 nm, ≥ 0.9 A/W at 1550 nm - Dark current (Vr = –5 V, 25 °C): ≤ 1.0 nA - Active area: 300 µm - Bandwidth (R = 50 Ω, Pin = 10 dBm, small signal): ≥ 0.4 GHz - Capacitance (Vr = –5 V, f = 1 MHz): ≤ 6 pF - Maximum reverse voltage: 20 V - Maximum forward current: 6 mA - Return loss at 1550 nm, 23 °C: ≥ 45 dB - Maximum input optical power: 5 mW These values put it in line with similar InGaAs fiber‑pigtailed PIN photodiodes used for low‑noise, medium‑speed optical detection around 1.3 µm and 1.55 µm.

The standard configuration uses single‑mode fiber compatible with telecom systems, specifically SMF‑28 with either 250 µm or 900 µm coating: - Fiber type: B = SMF‑28, 250 µm; L = SMF‑28, 900 µm; X = other custom fibers on request - Connector options: NE = none (bare fiber), FA = FC/APC, FC = FC/PC, SA = SC/APC, SC = SC/PC; X = other connector types available on request (e.g., LC, E2000) depending on customization - Standard fiber length: 10 = 1.0 m, 15 = 1.5 m; X = other custom lengths These options are comparable to typical single‑mode InGaAs photodiodes listed on FindLight and other vendors, and Ascentta can customize the fiber/connector to match existing systems.

The device is offered in a compact TO‑can style package suitable for integration into optical modules and instruments. The ordering code provides: - Package type: T46 = TO‑46 can (X = others on request) - Package dimensions: 5523 = Φ 5.5 mm × L 23 mm can (X = others on request) This form factor is common for fiber‑pigtailed InGaAs photodiodes and is compatible with standard mounts and heatsinks used in optical receivers and test setups. Detailed drawings and package dimensions are typically available from Ascentta upon request for mechanical design and PCB layout.

The specified temperature ranges are: - Operating temperature: 0 °C to +70 °C - Storage temperature: –40 °C to +85 °C These ranges are typical for non‑hermetic or semi‑hermetic telecom‑grade components and are suitable for most indoor telecom, datacom, and laboratory environments. For outdoor, extended‑temperature, or harsh industrial applications, Ascentta can be contacted to discuss hermetic packaging or custom designs, similar to how other InGaAs PIN photodiode suppliers offer extended‑temperature variants.

This device is a PIN photodiode that requires an external bias and a transimpedance or load resistor. Typical usage guidelines, in line with similar InGaAs photodiodes, are: - Apply a reverse bias (commonly around –5 V) within the maximum rating of –20 V. - Use a suitable load or transimpedance amplifier (TIA) with 50 Ω or higher input, depending on bandwidth and sensitivity requirements. - Keep the forward current below 6 mA and do not exceed 5 mW input optical power to avoid damage. - For best bandwidth and noise performance, minimize parasitic capacitance and keep lead lengths short. - Maintain ESD precautions and use proper grounding to protect the diode. Ascentta can provide application notes or recommended circuit topologies upon request, similar to documentation from other optical detector manufacturers.

The ordering code for this product is structured to specify material, active area, package, mechanical dimensions, fiber type, fiber length, and connector. For example: - PPD–PIN–IGA–3.00–T46–5523–B–10–FA would describe an InGaAs PIN photodiode with 300 µm active area in a TO‑46 (Φ 5.5 × 23 mm) package, SMF‑28 fiber with 250 µm coating, 1.0 m length, and FC/APC connector. Parameters marked “X = Others” (material, active area, package, dimensions, fiber type, length, connector) can be customized. To order or discuss non‑standard configurations (different active area, fiber type, connector style, or package), contact Ascentta at sales@ascentta.com or via their website, providing your required wavelength range, speed, fiber/connector type, and mechanical constraints.