Temperature-adjustable OCM or TOF

Abstract

The utility model relates to a temperature adjustable OCM or TOF, comprising two oppositely arranged optical fiber collimators, an ultra-thin etalon and a silicon-based etalon are sequentially arranged between the two optical fiber collimators, the ultra-thin etalon is formed by plating a-Si, SiH or GeH film on a silicon substrate, and the silicon-based etalon is formed by plating a-Si, SiH or GeH film on the silicon substrate. The ultra-thin etalon and the silicon-based etalon are respectively connected with a temperature controller for adjusting the temperatures of the ultra-thin etalon and the silicon-based etalon; the line width of the ultra-thin etalon is smaller than the free spectral range of the silicon-based etalon, and the line width top of the ultra-thin etalon is always and synchronously sleeved above one transmission wavelength of the silicon-based etalon along with the temperature change; when pulse or quasi-pulse is used for rapid adjustment, the OCM is used as a high-resolution OCM; during low-speed adjustment, the TOF serves as a narrow or ultra-narrow bandwidth TOF. According to the utility model, the advantages of both the film-coated etalon and the silicon-based etalon are combined, and the degree of freedom is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber communication, in particular to an OCM or TOF with adjustable temperature. Background Art

[0002] Existing technologies include a tandem structure based on silicon wafer etalons, using either a single TEC (Transistor Coating) or a single heating resistor plated on the wafer for heating. The other type is a simple film-coated etalon, primarily using a heating resistor plated on the wafer for heating. Each corresponds to a different product type: the former is primarily used for TOF (Optical Channel Monitoring Modules), while the latter is primarily used for OCM (Tunable Optical Filters). Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an OCM or TOF with adjustable temperature.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A temperature-adjustable OCM or TOF device comprises two fiber collimators arranged opposite each other, with an ultrathin etalon and a silicon-based etalon sequentially arranged between the two fiber collimators. The ultrathin etalon is formed by coating a silicon substrate with an a-Si, SiH, or GeH film. The ultrathin etalon and the silicon-based etalon are respectively connected to a temperature controller for adjusting their temperatures. The linewidth of the ultrathin etalon is smaller than the free spectral range of the silicon-based etalon, and as the temperature changes, the top of the linewidth of the ultrathin etalon is always synchronously positioned above one of the transmission wavelengths of the silicon-based etalon. When pulse or quasi-pulse rapid modulation is adopted, the device functions as a high-resolution OCM; when slow modulation is adopted, the device functions as a narrow or ultra-narrow bandwidth TOF.

[0006] Furthermore, the ultra-thin etalon is a single-cavity or double-cavity structure.

[0007] Furthermore, the temperature controller is a TEC temperature controller.

[0008] Furthermore, a fiber collimator is also provided between the ultra-thin etalon and the silicon-based etalon to connect the two in series.

[0009] The utility model adopts the above technical solution, combines the advantages of both the film-coated etalon and the silicon-based etalon, and has a higher degree of freedom. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0011] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0012] Figure 2 Schematic diagram of the line width of the ultra-thin etalon and the free spectral range of the silicon-based etalon;

[0013] Figure 3 This is a schematic diagram of the present invention without the silicon-based etalon;

[0014] Figure 4 This is a structural diagram of Example 2 of the present utility model. DETAILED DESCRIPTION

[0015] like Figure 1-2 As shown in Example 1, the present invention provides a temperature-adjustable OCM or TOF, comprising two fiber collimators 1 arranged opposite to each other, with an ultra-thin etalon 2 and a silicon-based etalon 3 arranged in sequence between the two fiber collimators 1 .

[0016] The ultra-thin etalon 2 is formed by coating an a-Si film on a silicon substrate 4. SiH films can also be used, with transmittance reaching 800nm-1100nm. GeH films are also transparent starting at 800nm ​​and have a higher thermo-optic coefficient and refractive index. The ultra-thin etalon 2 has a single- or dual-cavity structure. The FSR of the ultra-thin etalon is large, while the cavity length is very small. The silicon substrate serves as the substrate and does not serve as the etalon itself.

[0017] If the additional coating of the silicon-based etalon 3 only serves as a transmission or reflection film, and the coating itself does not serve as an etalon, the silicon-based etalon 3 has a smaller FSR and a larger cavity length than the ultra-thin etalon 2.

[0018] The line width of the ultra-thin etalon 2 is smaller than the free spectral range (FSR) of the silicon-based etalon 3 , and as the temperature changes, the top of the line width of the ultra-thin etalon 2 is always synchronously positioned above one of the transmission wavelengths of the silicon-based etalon 3 .

[0019] The ultra-thin etalon 2 and the silicon-based etalon 3 are respectively connected to a temperature controller 5 for adjusting their temperatures. When pulse or quasi-pulse rapid adjustment is adopted, the present invention functions as a high-resolution OCM; when slow adjustment is adopted, the present invention functions as a narrow or ultra-narrow bandwidth TOF.

[0020] like Figure 4 As shown, embodiment 2 is based on embodiment 1 and a fiber collimator is also added between the ultra-thin etalon 2 and the silicon-based etalon 3 to connect the two in series.

[0021] In addition, if Figure 3 As shown, if only an ultra-thin etalon 2 is provided between two optical fiber collimators 1 , the present invention is used as a TOF.

[0022] The utility model can adopt a dual heating mode: the metal-plated ring is heated quickly, and the normal heating block and cooling plate are provided at the same time. The heating resistor is plated on the silicon substrate to heat the standard tool quickly.

[0023] In this embodiment, the temperature controller 5 is a TEC thermostat, which can be used for heating or cooling.

[0024] The above describes the specific implementation of the present invention, but those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this implementation without departing from the principle and essence of the present invention, but these changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A temperature-adjustable optical fiber optic (OCM) or time of flight (TOF) system comprising two optical fiber collimators disposed opposite to each other, characterized in that: An ultrathin etalon and a silicon-based etalon are sequentially arranged between the two fiber collimators. The ultrathin etalon is formed by coating an a-Si, SiH, or GeH film on a silicon substrate. The ultrathin etalon and the silicon-based etalon are respectively connected to a temperature controller for regulating their temperatures. The linewidth of the ultrathin etalon is smaller than the free spectral range of the silicon-based etalon, and as the temperature changes, the top of the linewidth of the ultrathin etalon is always synchronously mounted above one of the transmission wavelengths of the silicon-based etalon. When pulse or quasi-pulse rapid modulation is adopted, it functions as a high-resolution OCM; when slow modulation is adopted, it functions as a narrow or ultra-narrow bandwidth TOF.

2. The temperature-adjustable OCM or TOF according to claim 1, characterized in that: The ultra-thin etalon has a single-cavity or double-cavity structure.

3. The temperature-adjustable OCM or TOF according to claim 1, characterized in that: The temperature controller is a TEC temperature controller.

4. The temperature-adjustable OCM or TOF according to claim 1, characterized in that: A fiber collimator is also provided between the ultra-thin etalon and the silicon-based etalon to connect the two in series.

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